Wikipedia:WikiProject U.S. Roads/Washington/List of pre-1964 highways
[1] has the main sources. [2] appears to be the latest available statutes with the old numbers.
| Old | New | From | To | Creation and notes |
|---|---|---|---|---|
| PSH 1 | I-5, US 99 | British Columbia | Oregon | 1937 c 190 § 1: British Columbia to Oregon |
| PSH 1 TR | SR 543 | British Columbia | Blaine (I-5) | |
| PSH 1 AP Austin Pass Branch |
SR 542 | Bellingham (I-5) | Austin Pass | 1937 c 190 § 1: Bellingham to Austin Pass |
| PSH 1 CD Chuckanut Drive Branch |
SR 11 | Bellingham (I-5) | Burlington (I-5) | 1937 c 190 § 1: Bellingham to Mt. Vernon |
| PSH 1 AN Anacortes Branch |
SR 536 | Mt. Vernon (I-5) | Anacortes | 1937 c 190 § 1: Mt. Vernon to Anacortes |
| PSH 1 MA | SR 528 | Marysville (I-5) | East of Marysville (SR 9) | 1961 ex.s. c 21 § 1 |
| PSH 1 RE East Lake Washington Loop |
SR 518 | Riverton Heights (SR 99) | Tukwila (I-5) | 1957 c 172 § 2 |
| PSH 1 RE East Lake Washington Loop |
I-405 | Tukwila (I-5) | Alderwood Manor (I-5) | 1957 c 172 § 2 |
| PSH 1 WM | US 99 Temp. | Foster (I-5) | Seattle (SR 509) | 1957 c 172 § 2 |
| PSH 1 EP | SR 520 | Seattle (I-5) | Redmond (SR 522) | 1961 ex.s. c 21 § 1 |
| PSH 1 | I-205 | North of Vancouver (I-5) | Oregon | 1961 ex.s. c 21 § 1 |
| PSH 1 DC Duwamish Connection |
SR 181 | Duwamish (SR 99) | South Seattle (SR 900) | 1963 ex.s. c 3 § 21 |
| PSH 1 | Everett | South of Everett | 1937 c 190 § 1: Everett southwest | |
| SSH 1A | SR 9 | Lawrence (SR 542) | British Columbia | 1937 c 207 § 2: Blaine to Bothell, Van Buren to British Columbia |
| SSH 1A Wiser Lake Nooksack Branch |
SR 544 | Nooksack (SR 9) | Wiser Lake (US 99 Alt.) | |
| SSH 1A | SR 9 | Deming (SR 542) | Woodinville (SR 522) | 1937 c 207 § 2: Blaine to Bothell |
| SSH 1A | Blaine | Van Buren | 1937 c 207 § 2: Blaine to Bothell | |
| SSH 1B | US 99 Alt. (SR 539) |
Bellingham (I-5) | British Columbia | 1937 c 207 § 2: Bellingham to British Columbia |
| SSH 1B Van Buren Branch |
SR 546 | Lynden (US 99 Alt.) | Van Buren (SR 9) | was part of 1A |
| SSH 1C | SR 537 | Edison (SR 11) | Whitney (SR 536) | 1937 c 207 § 2: Blanchard to Whitney |
| SSH 1C Burlington Branch |
Burlington | North of Whitney | 1937 c 207 § 2: Burlington to Whitney | |
| SSH 1D | SR 525 | Anacortes (SR 536) | Clinton | 1937 c 207 § 2: Anacortes to Columbia Beach |
| SSH 1D Keystone Branch |
SR 113 | Southeast of Coupeville (SR 525) | Keystone | |
| SSH 1E | SR 530 | Conway (I-5) | Arlington (I-5) | 1937 c 207 § 2: Conway to Arlington |
| SSH 1E | SR 530 | Arlington (I-5) | Darrington | |
| SSH 1F | SR 110 | Bellingham (SR 11) | Bellingham (I-5) | |
| SSH 1F | Northwest of Burlington | Sedro-Woolley | 1937 c 207 § 2: Allen to Sedro-Wolley; became part of PSH 16 (SR 20) in 1961 | |
| SSH 1G | SR 538 | Mt. Vernon (I-5) | South of Clear Lake (SR 9) | 1937 c 207 § 2: Mt. Vernon east |
| SSH 1H | SR 534 | Conway (I-5) | McMurray (SR 9) | 1937 c 207 § 2: Conway to McMurray |
| SSH 1I | SR 526 | Everett (I-5) | Mukilteo (SR 525) | 1937 c 207 § 2: Everett south |
| SSH 1I | SR 525 | Mukilteo | Martha Lake (I-5) | 1937 c 207 § 2: Everett south |
| SSH 1J | SR 513 | North Seattle (I-5) | Downtown Seattle (US 10) | 1937 c 207 § 2: Seattle north |
| SSH 1K | SR 509 | Seattle (SR 99) | Des Moines (SR 516) | 1937 c 207 § 2: Seattle to (southeast of) Des Moines |
| SSH 1K | SR 516 | Des Moines (SR 509) | Midway (I-5) | 1937 c 207 § 2: Seattle to (southeast of) Des Moines |
| SSH 1L | SR 518 | Riverton Heights (SR 99) | Sunnydale (SR 509) | 1937 c 207 § 2: Renton to Sunnydale |
| SSH 1L | Renton | Riverton Heights | 1937 c 207 § 2: Renton to Sunnydale | |
| SSH 1M | SR 801 (SR 121) |
Maytown (I-5) | Rochester (SR 8) | 1937 c 207 § 2: Tumwater to Rochester |
| SSH 1N | SR 507 | Centralia (I-5) | Tenino | |
| SSH 1N | Centralia | Rochester | 1937 c 207 § 2: Centralia to Rochester (Lincoln Creek Road and Independence Road), eliminated in 1953 | |
| SSH 1P | SR 506 | Toledo (I-5) | Ryderwood | 1937 c 207 § 2: Toledo to Ryderwood |
| SSH 1Q | SR 505 | Toledo (I-5) | Toutle (SR 504) | 1937 c 207 § 2: Toledo to Toutle |
| SSH 1R | SR 504 | Castle Rock (I-5) | Mt. St. Helens | 1937 c 207 § 2: Castle Rock to Mt. St. Helens |
| SSH 1S | SR 503 | Woodland (I-5) | Battle Ground (SR 502) | 1937 c 207 § 2: Woodland to Vancouver |
| SSH 1S | SR 502 | Battle Ground (SR 503) | North of Vancouver (I-5) | 1937 c 207 § 2: Woodland to Vancouver |
| SSH 1T | SR 501 | Vancouver (I-5) | East of Ridgefield (I-5) | 1937 c 207 § 2: Vancouver to La Center |
| SSH 1U | SR 503 | Battle Ground (SR 502) | Orchards (SR 500) | 1937 c 207 § 2: Battle Ground to Orchards |
| SSH 1V | SR 509 | Tacoma (I-5) | Des Moines (SR 516) | 1937 c 207 § 2: Tacoma to Des Moines |
| SSH 1W | SR 104 | Mountlake Terrace (I-5) | Edmonds | 1937 c 207 § 2: Edmonds southeast |
| SSH 1W | SR 524 | Edmonds (SR 104) | North of Bothell (SR 527) | |
| SSH 1X | SR 514 | Fife (SR 99) | Milton (SR 161) | 1937 c 207 § 2: through Milton |
| SSH 1Y | SR 532 | East Stanwood (I-5) | McEachern's Corner | |
| SSH 1Z | SR 540 | Lummi Indian Reservation | Brennan (I-5) | |
| PSH 2 | I-90, US 10 | Seattle (I-5) | Issaquah (SR 900) | |
| PSH 2 | I-90, US 10 | Issaquah (SR 900) | Teanaway (US 97) | 1937 c 190 § 2: Seattle via Renton to Idaho |
| PSH 2 | US 97 | Teanaway (I-90) | Peshastin (US 2) | 1937 c 190 § 2: Seattle via Renton to Idaho |
| PSH 2 | US 2 | Peshastin (US 97) | Spokane (I-90) | 1937 c 190 § 2: Seattle via Renton to Idaho |
| PSH 2 | I-90, US 10 | Spokane (US 2) | Idaho | 1937 c 190 § 2: Seattle via Renton to Idaho |
| PSH 2 RE Renton Branch |
SR 900 | Seattle (I-90) | Issaquah (I-90) | 1937 c 190 § 2: Seattle via Renton to Idaho |
| PSH 2 BO Bothell Branch |
SR 522 | Seattle (US 10) | Woodinville (SR 202) | 1937 c 190 § 2: Seattle to Snoqualmie Pass |
| PSH 2 BO Bothell Branch |
SR 522 (SR 202) |
Woodinville (SR 202) | North Bend (I-90) | 1937 c 190 § 2: Seattle to Snoqualmie Pass |
| PSH 2 AN Echo Lake Branch |
SR 18 | West of North Bend (I-90) | West of Auburn (SR 99) | |
| PSH 2 | Almira | Grand Coulee Dam | 1937 c 190 § 2: Almira to Grand Coulee Dam | |
| SSH 2A | Woodinville | North of Kirkland | Became part of PSH 1 RE (I-405) in 1963 | |
| SSH 2A | Renton | Everett | 1937 c 207 § 3: Renton to Everett | |
| SSH 2B | SR 104 | Lake Forest Park (SR 522) | Mountlake Terrace (I-5) | 1937 c 207 § 3: Lake Forest Park northwest |
| SSH 2C | Woodinville | Duvall | 1937 c 207 § 3: Woodinville to Duvall; Eliminated in 1943 | |
| SSH 2D | SR 901 | Issaquah (SR 900) | Bellevue (SR 520) | 1937 c 207 § 3: Issaquah to Kirkland |
| SSH 2E | SR 903 | Cle Elum (US 97) | Cle Elum Lake | 1937 c 207 § 3: Cle Elum to Cle Elum Lake |
| SSH 2F | SR 155 | Coulee City (US 2) | Grand Coulee Dam | 1937 c 207 § 3: Coulee City to Grand Coulee Dam |
| SSH 2G | SR 231 | Reardan (US 2) | Sprague (SR 23) | 1937 c 207 § 3: Reardan to Sprague |
| SSH 2H | SR 290 | Spokane (US 2) | Idaho | 1937 c 207 § 3: Spokane to (near) Idaho |
| SSH 2I | SR 131 | Virden (US 97) | Woldale (I-90) | 1937 c 207 § 3: Virden to (southeast of) Teanaway |
| SSH 2J | SR 527 | Bothell (SR 522) | South Everett (I-5) | |
| SSH 2K | SR 906 | West of Snoqualmie Pass (I-90) | East of Snoqualmie Pass (I-90) | |
| SSH 2M | SR 181 | Auburn (SR 18) | South of Seattle (I-5) | |
| PSH 3 | I-90, US 10, US 97 | Teanaway (US 97) | Ellensburg (I-82) | 1937 c 190 § 3: Cle Elum to British Columbia |
| PSH 3 | I-82, US 97 | Ellensburg (I-90) | Union Gap (US 410) | 1937 c 190 § 3: Cle Elum to British Columbia |
| PSH 3 | US 410 (US 12) |
Union Gap (I-82) | Dodge (US 295) | 1937 c 190 § 3: Cle Elum to British Columbia |
| PSH 3 | US 295 (SR 127) |
Dodge (US 410) | Colfax (US 195) | 1937 c 190 § 3: Cle Elum to British Columbia |
| PSH 3 | US 195 | Colfax (US 295) | Spokane (I-90) | 1937 c 190 § 3: Cle Elum to British Columbia |
| PSH 3 | US 395 | Spokane (US 2) | British Columbia | 1937 c 190 § 3: Cle Elum to British Columbia |
| PSH 3 | I-82 | Union Gap (US 410) | Oregon | |
| PSH 3 DC Dodge Clarkston Branch |
US 410 (US 12) |
Dodge (US 295) | Idaho | 1937 c 190 § 3: Dodge to Idaho |
| PSH 3 DC Oregon to Clarkston Branch |
SR 129 | Clarkston (US 410) | Oregon | 1937 c 190 § 3: Clarkston to Oregon |
| PSH 3 WA Wallula State Line Branch |
US 395 | Wallula (US 410) | Oregon | 1937 c 190 § 3: Wallula to Oregon |
| PSH 3 WW Walla Walla State Line Branch |
SR 125 | Walla Walla (US 410) | Oregon | 1937 c 190 § 3: Walla Walla to Oregon |
| PSH 3 ED Rosalia Pullman State Line Branch |
SR 271 | Rosalia (US 195) | Oakesdale (SR 27) | 1937 c 190 § 3: Rosalia to Idaho |
| PSH 3 ED Rosalia Pullman State Line Branch |
SR 27 | Oakesdale (SR 271) | Pullman (US 195) | 1937 c 190 § 3: Rosalia to Idaho |
| PSH 3 ED Rosalia Pullman State Line Branch |
US 195 | Pullman (SR 27) | Southeast of Uniontown (US 95) | 1937 c 190 § 3: Rosalia to Idaho |
| PSH 3 ED Rosalia Pullman State Line Branch, Genesee Spur Connection |
US 95 | Idaho | Idaho | 1937 c 190 § 3: Rosalia to Idaho |
| PSH 3 CP Colfax Pullman State Line Branch |
US 195 | Colfax (US 295) | Pullman (SR 27) | 1937 c 190 § 3: Colfax to Idaho |
| PSH 3 CP Colfax Pullman State Line Branch |
SR 270 | Pullman (US 195) | Idaho | 1937 c 190 § 3: Colfax to Idaho |
| PSH 3 Palouse State Line Branch |
SR 272 | Palouse (SR 27) | Idaho | 1937 c 190 § 3: Palouse to Idaho |
| SSH 3A | US 97 | Union Gap (I-82) | Toppenish (SR 22) | 1937 c 207 § 4: Union Gap to Prosser |
| SSH 3A | SR 22 | Toppenish (US 97) | Prosser (US 410) | 1937 c 207 § 4: Union Gap to Prosser |
| SSH 3B | SR 220 | Toppenish (SR 22) | Fort Simcoe | 1937 c 207 § 4: Toppenish to White Swan |
| SSH 3C | South of Union Gap | West of Toppenish | 1937 c 207 § 4: Union Gap to Toppenish; eliminated in 1957 | |
| SSH 3D | SR 124 | Burbank (US 395) | Prescott (SR 125) | 1937 c 207 § 4: Touchet to Prescott |
| SSH 3E | SR 125 | Walla Walla (US 410) | Prescott (SR 124) | 1937 c 207 § 4: Walla Walla to Waitsburg |
| SSH 3E | SR 124 | Prescott (SR 125) | Waitsburg (US 410) | 1937 c 207 § 4: Walla Walla to Waitsburg |
| SSH 3F | SR 272 | Colfax (US 195) | Palouse (SR 27) | 1937 c 207 § 4: Colfax to Palouse |
| SSH 3G | SR 193 | Colton (US 195) | Clarkston (US 410) | |
| SSH 3H Oakesdale State Line Branch (south of Tekoa) |
SR 27 | Opportunity (I-90) | Oakesdale (SR 271) | 1937 c 207 § 4: Opportunity to Oakesdale |
| SSH 3H Oakesdale State Line Branch |
SR 274 | Tekoa (SR 27) | Idaho | 1937 c 207 § 4: Tekoa to Idaho |
| SSH 3I | South from Spokane | via Grand Boulevard | 1937 c 207 § 4: Spokane south; eliminated in 1953 | |
| SSH 3J | SR 231 | Chewelah (US 395) | Reardan (US 2) | 1937 c 207 § 4: Springdale to Long Lake |
| SSH 3J Springdale Loon Lake Branch |
SR 292 | Springdale (SR 231) | Loon Lake (US 395) | |
| SSH 3K | SR 128 | Pomeroy (US 410) | Clarkston (US 410) | 1937 c 207 § 4: Pomeroy to Clarkston |
| SSH 3L | SR 126 | Dayton (US 410) | Pomeroy (US 410) | 1937 c 207 § 4: Dayton to Pomeroy |
| SSH 3M | Northwest of Thorp | Ellensburg | 1937 c 207 § 4: Thorp to Ellensburg (Thorp Highway); eliminated in 1953 | |
| SSH 3P | SR 30 | Kettle Falls (US 395) | Republic (SR 21) | |
| SSH 3R | SR 240 | Richland Wye (US 410) | Richland (SR 224) | |
| SSH 3R | SR 224 | Richland (SR 240) | Kiona (US 410) | |
| SSH 3S | SR 291 | Spokane (US 2) | Nine Mile Falls | |
| SSH 3T | SR 223 | Alfalfa (SR 22) | Granger (US 410) | |
| SSH 3U | SR 232 | South of Valley (SR 231) | Southeast of Valley (US 395) | |
| SSH 3V | SR 241 | Sunnyside (US 410) | South of Mattawa (SR 24) | |
| PSH 4 | SR 21 | Wilbur (US 2) | Republic (SR 30) | 1937 c 190 § 4: Wilbur to Tonasket |
| PSH 4 | SR 30 | Republic (SR 21) | Tonasket (US 97) | 1937 c 190 § 4: Wilbur to Tonasket |
| SSH 4A | SR 21 | Republic (SR 30) | British Columbia | 1937 c 207 § 5: Republic to British Columbia |
| SSH 4B | SR 21 | Wilbur (US 2) | Lind (US 395) | 1937 c 207 § 5: Wilbur to Lind |
| SSH 4C | SR 174 | Wilbur (SR 21) | Grand Coulee (SR 155) | 1937 c 207 § 5: Wilbur to Grand Coulee Dam |
| PSH 5 Seattle Enumclaw Branch |
SR 167 | Seattle (SR 900) | Auburn (SR 163) | 1937 c 190 § 5: Seattle to Yakima |
| PSH 5 Seattle Enumclaw Branch |
SR 167 (SR 164) |
Auburn (SR 163) | Enumclaw (US 410) | 1937 c 190 § 5: Seattle to Yakima |
| PSH 5 Tacoma Enumclaw Yakima Branch |
US 410 | Enumclaw (SR 167) | Yakima (I-82) | 1937 c 190 § 5: Seattle to Yakima |
| PSH 5 WP White Pass Branch |
SR 14 (US 12) |
Southeast of Chehalis (I-5) | Northwest of Yakima (US 410) | 1937 c 190 § 5: Chehalis to Yakima |
| PSH 5 TR Mt. Rainier National Park Branch |
SR 7 | Tacoma (I-5) | Elbe (SR 706) | 1937 c 190 § 5: Tacoma to Mt. Rainier |
| PSH 5 TR Mt. Rainier National Park Branch |
SR 706 | Elbe (SR 7) | Mt. Rainier | 1937 c 190 § 5: Tacoma to Mt. Rainier |
| PSH 5 EK Elbe Kosmos Branch |
SR 7 | Elbe (SR 706) | Kosmos (SR 14) | 1937 c 190 § 5: Elbe to Kosmos |
| PSH 5 EF Tacoma Enumclaw Yakima Branch |
US 410 | Enumclaw (SR 167) | Buckley (SR 165) | 1937 c 190 § 5: Enumclaw to Mt. Rainier |
| PSH 5 EF Fairfax Branch |
SR 165 | Buckley (US 410) | Mt. Rainier | 1937 c 190 § 5: Enumclaw to Mt. Rainier |
| PSH 5 AT Sumner Auburn Branch |
SR 163 (SR 167) |
Auburn (SR 167) | Sumner (US 410) | 1937 c 190 § 5: Auburn to Tacoma |
| PSH 5 AT Tacoma Enumclaw Yakima Branch |
US 410 | Sumner (SR 163) | Tacoma (I-5) | 1937 c 190 § 5: Auburn to Tacoma |
| PSH 5 CP Ohanapecosh Branch |
SR 143 (SR 123) |
Cayuse Pass (US 410) | West of White Pass (SR 14) | 1937 c 190 § 5: Chinook Pass to White Pass |
| PSH 5 SB Tacoma Enumclaw Yakima Branch |
US 410 | Sumner (SR 163) | Buckley (SR 165) | 1937 c 190 § 5: Sumner to Buckley |
| PSH 5 ER Maple Valley Branch |
SR 169 | Enumclaw (SR 167) | Renton (SR 900) | 1937 c 190 § 5: Enumclaw to Renton |
| PSH 5 | SR 168 | Greenwater River (US 410) | American River (US 410) | |
| PSH 5 | Auburn | Federal Way | 1937 c 190 § 5: Auburn to Federal Way | |
| SSH 5A | SR 516 | Summit (SR 169) | Midway (I-5) | 1937 c 207 § 6: (south of) Maple Valley to Midway |
| SSH 5B | Auburn | Covington | 1937 c 207 § 6: Auburn to (south of) Maple Valley (Auburn Black Diamond Road and Kent Black Diamond Road); eliminated in 1963 | |
| SSH 5C | SR 515 | Renton (SR 900) | Kent (SR 516) | 1937 c 207 § 6: Renton to Kent |
| SSH 5D | SR 161 | Puyallup (US 410) | Auburn (SR 18) | 1937 c 207 § 6: Puyallup to Federal Way |
| SSH 5E | SR 162 | Puyallup (SR 161) | Buckley (SR 165) | 1937 c 207 § 6: Puyallup to Buckley |
| SSH 5E | Orting | Electron | 1937 c 207 § 6: Orting to Electron | |
| SSH 5G | SR 512 | Puyallup (SR 161) | South Tacoma (I-5) | 1937 c 207 § 6: Puyallup to Tacoma |
| SSH 5H | SR 507 | Roy Junction (SR 7) | Tenino | 1937 c 207 § 6: Tacoma to Tenino |
| SSH 5I | SR 510 | Yelm (SR 507) | Lacey (I-5) | 1937 c 207 § 6: Yelm to Tumwater |
| SSH 5J | SR 702 | McKenna (SR 507) | Northwest of Eatonville (SR 7) | 1937 c 207 § 6: McKenna east |
| SSH 5K | SR 508 | Morton (SR 7) | Napavine (I-5) | 1937 c 207 § 6: Morton to Chehalis |
| SSH 5L | SR 141 | Morton (SR 7) | Riffe (SR 14) | 1937 c 207 § 6: Morton to Riffe |
| SSH 5M | Auburn | South of Seattle | 1937 c 207 § 6: Auburn to Seattle; became SSH 2M in 1959 | |
| SSH 5N | SR 161 | Puyallup (US 410) | Eatonville (SR 7) | |
| PSH 6 | US 2 | Spokane (US 395) | Newport (SR 31) | 1937 c 190 § 6: Spokane to British Columbia |
| PSH 6 | SR 31 | Newport (US 2) | British Columbia | 1937 c 190 § 6: Spokane to British Columbia |
| PSH 6 Newport State Line Branch |
US 2 | Newport (SR 31) | Idaho | 1937 c 190 § 6: Newport to Idaho |
| PSH 6 | US 2 | Newport (US 2) | Idaho | Now SR 41 |
| SSH 6A | SR 294 | Tiger (SR 31) | Colville (US 395) | 1937 c 207 § 7: Tiger to Colville |
| SSH 6B | SR 311 | Usk (SR 31) | Southwest of Newport (US 2) | 1937 c 207 § 7: Usk to Newport |
| PSH 7 | I-90, US 10 | Ellensburg (I-82) | George (SR 281) | 1937 c 190 § 7: Ellensburg to Davenport |
| PSH 7 | SR 281 | George (I-90) | Quincy (SR 28) | 1937 c 190 § 7: Ellensburg to Davenport |
| PSH 7 | SR 28 | Quincy (SR 281) | Davenport (US 2) | 1937 c 190 § 7: Ellensburg to Davenport |
| PSH 7 Soap Lake Coulee City |
SR 17 | Soap Lake (SR 28) | Coulee City (US 2) | 1937 c 190 § 7: Soap Lake to Coulee City |
| PSH 7 Burke Naylor Cutoff |
SR 283 | George (I-90) | Southwest of Ephrata (SR 28) | |
| SSH 7B | Ellensburg | Kittitas | 1937 c 207 § 8: Ellensburg to Kittitas (Kittitas Highway); eliminated in 1953 | |
| SSH 7C | SR 26 | Vantage (I-90) | Washtucna (SR 261) | |
| SSH 7C Priest Rapids Branch |
SR 243 | Vantage (SR 26) | Southeast of Mattawa (SR 24) | |
| SSH 7E | SR 171 | Odessa (SR 28) | Moses Lake (I-90) | |
| PSH 8 | US 830 (SR 14) |
Vancouver (I-5) | Maryhill (US 97) | 1937 c 190 § 8: Vancouver to Yakima |
| PSH 8 | US 97 | Maryhill (US 830) | Toppenish (SR 22) | 1937 c 190 § 8: Vancouver to Yakima |
| PSH 8 | SR 22 | Toppenish (US 97) | Buena (US 410) | 1937 c 190 § 8: Vancouver to Yakima |
| PSH 8 MA Maryhill Ferry Connection |
US 97 | Maryhill (US 830) | Biggs Rapids Bridge | 1937 c 190 § 8: Maryhill to Columbia River |
| PSH 8 MK Kennewick Branch |
SR 12 (SR 14) |
Maryhill (US 830) | Kennewick (US 410) | |
| PSH 8 Paterson to Prosser |
SR 221 | Paterson (SR 12) | Prosser (SR 22) | |
| SSH 8A | SR 500 | Camas (US 830) | Vancouver (I-5) | 1937 c 207 § 9: Vancouver to Camas |
| SSH 8B | SR 120 (SR 140) |
Washougal (US 830) | Prindle (US 830) | 1937 c 207 § 9: Washougal east |
| SSH 8C | East of Stevenson | Gifford Pinchot National Forest | 1937 c 207 § 9: Stevenson to Columbia National Forest (Wind River Road); eliminated in 1961 | |
| SSH 8D | SR 121 (SR 141) |
Underwood (US 830) and White Salmon (US 830) | Gifford Pinchot National Forest | 1937 c 207 § 9: White Salmon to Columbia National Forest |
| SSH 8E | SR 122 (SR 142) |
Lyle (US 830) | Goldendale (US 97) | |
| SSH 8E | Prosser | Paterson | 1937 c 207 § 9: Goldendale to Prosser; became part of PSH 8 (SR 221) in 1953 | |
| PSH 9 | US 410 (SR 8) |
Tumwater (US 101) | Elma (SR 8) | 1937 c 190 § 9: Olympia to Olympia |
| PSH 9 | US 410 (US 12) |
Elma (SR 8) | Aberdeen (US 101) | 1937 c 190 § 9: Olympia to Olympia |
| PSH 9 | US 101 | Aberdeen (US 410) | West of Olympia (I-5) | 1937 c 190 § 9: Olympia to Olympia |
| PSH 9 PT Port Townsend Branch |
SR 113 | Discovery Bay (US 101) | Port Townsend | 1937 c 190 § 9: Discovery Bay to Port Townsend |
| PSH 9 EG Grand Mound Elma Branch |
SR 8 (US 12) |
Elma (US 410) | Grand Mound (I-5) | 1937 c 190 § 9: Elma to Centralia |
| PSH 9 MA Artic Branch |
SR 107 | Montesano (US 410) | Artic (US 101) | 1937 c 190 § 9: Montesano to Artic |
| SSH 9A | SR 112 | Port Angeles (US 101) | Neah Bay | 1937 c 207 § 10: Port Angeles to Sappho |
| SSH 9B | Forks | La Push | 1937 c 207 § 10: Mora east, La Push east (SR 110); eliminated in 1955 | |
| SSH 9C | SR 109 | Hoquiam (US 101) | Queets (US 101) | 1937 c 207 § 10: Hoquiam to Copalis Crossing (loop) |
| SSH 9D | SR 108 | McCleary (US 410) | Kamilche (US 101) | 1937 c 207 § 10: McCleary to Shelton |
| SSH 9E | SR 104 | Discovery Bay (US 101) | Hood Canal Bridge (SR 3) | 1937 c 207 § 10: Discovery Bay to Port Ludlow |
| SSH 9F | Sequim | Dungeness | 1937 c 207 § 10: Sequim to Dungeness; eliminated in 1961 | |
| SSH 9G | SR 111 | Port Angeles (US 101) | Olympic National Park | |
| PSH 10 East Wenatchee Quincy Branch |
SR 28 | Quincy (SR 281) | East Wenatchee (US 2) | 1937 c 190 § 10: Quincy to Wenatchee |
| PSH 10 | US 97 | Olds (US 2) | British Columbia | 1937 c 190 § 10: Wenatchee to British Columbia |
| PSH 10 BC Coulee City Brewster Branch |
SR 17 | Brewster (US 97) | Coulee City (US 2) | 1937 c 190 § 10: Brewster to Coulee City |
| PSH 10 BB South Bank Branch |
SR 173 | Brewster (US 97) | Bridgeport (SR 17) | |
| SSH 10A | SR 155 | Omak (US 97) | Grand Coulee Dam | 1937 c 207 § 11: Omak to Grand Coulee Dam |
| SSH 10B Grand Coulee Branch |
SR 174 | Leahy (SR 17) | Grand Coulee (SR 155) | 1937 c 207 § 11: Bridgeport to Grand Coulee Dam |
| SSH 10B | SR 172 | Sims Corner (SR 17) | Farmer (US 2) | |
| SSH 10C | SR 150 | Chelan (US 97) | Manson | 1937 c 207 § 11: Chelan to Manson |
| SSH 10D | SR 151 | Chelan (US 97) | Orondo (US 2) | 1937 c 207 § 11: Chelan to Orondo |
| SSH 10D | SR 151 Chelan Wye Connection |
South of Azwell (US 97) | Chelan Station (SR 151) | |
| PSH 11 | US 395 | Pasco (US 410) | Ritzville (I-90) | 1937 c 190 § 11: Pasco to Spokane |
| PSH 11 | I-90, US 10, US 395 | Ritzville (US 395) | Spokane (US 2) | 1937 c 190 § 11: Pasco to Spokane |
| SSH 11A | SR 260 | Connell (US 395) | North of Mesa (SR 17) | 1937 c 207 § 12: Connell to Yakima |
| SSH 11A | SR 24 | Yakima (I-82) | Othello (SR 26) | 1937 c 207 § 12: Connell to Yakima |
| SSH 11A Ringold Branch |
SR 170 | Mesa (SR 17) | West of Mesa | 1937 c 207 § 12: Connell to Yakima |
| SSH 11B | SR 260 | Connell (US 395) | Washtucna (SR 26) | 1937 c 207 § 12: Dusty to Connell |
| SSH 11B | SR 26 | Washtucna (SR 261) | Dusty (US 295) | 1937 c 207 § 12: Dusty to Connell |
| SSH 11B | SR 261 | Washtucna (SR 26) | Delaney (US 410) | |
| SSH 11C | SR 240 | Southeast of Mattawa (SR 24) | Richland (SR 224) | |
| SSH 11C | Sprague | Steptoe | 1937 c 207 § 12: Sprague to Steptoe; became part of PSH 18 (SR 23) in 1953 | |
| SSH 11D | SR 902 | Four Lakes (I-90) | South of Medical Lake | |
| SSH 11E | SR 261 | Ritzville (I-90) | Washtucna (SR 26) | 1937 c 207 § 12: Ritzville to Washtucna |
| SSH 11F | SR 23 | Sprague (I-90) | Harrington (SR 28) | 1937 c 207 § 12: Sprague to Harrington |
| SSH 11G | SR 17 | Eltopia (US 395) | Soap Lake (SR 28) | |
| SSH 11G Ephrata Wye |
SR 282 | Rocky Ford (SR 17) | Ephrata (SR 28) | |
| SSH 11H | SR 904 | Tyler (I-90) | Four Lakes (I-90) | |
| SSH 11I | SR 170 | West of Warden (SR 17) | Warden | |
| PSH 12 | SR 6 | Chehalis (I-5) | Raymond (US 101) | 1937 c 190 § 12: Chehalis to Kelso |
| PSH 12 | US 101 | Raymond (SR 6) | Johnsons Landing (US 830) | 1937 c 190 § 12: Chehalis to Kelso |
| PSH 12 | US 830 (SR 4) |
Johnsons Landing (US 101) | Kelso (I-5) | 1937 c 190 § 12: Chehalis to Kelso |
| PSH 12 JM Johnsons Landing to Megler |
US 101 | Johnsons Landing (US 830) | Oregon | 1937 c 190 § 12: Johnson's Landing to Megler |
| PSH 12 Skinville Cutoff |
US 101 Alt. | Northeast of Ilwaco (US 101) | East of Ilwaco (US 101) | 1937 c 190 § 12: around Ilwaco |
| PSH 12 LB Longview Branch |
SR 832 (SR 432) |
Longview (US 830) | Longview Wye (I-5) | 1937 c 190 § 12: Longview to Kelso |
| PSH 12 North Connection in Kelso |
SR 831 (SR 431) |
Kelso (US 830) | North Kelso (I-5) | |
| PSH 12 | SR 833 (SR 433) |
Longview (SR 832) | Oregon | |
| SSH 12A | SR 103 | Seaview (US 101) | Ocean Park | 1937 c 207 § 13: Seaview to Ocean Park |
| SSH 12B | SR 401 | Megler (US 101) | Naselle (US 830) | 1937 c 207 § 13: Megler to Naselle |
| SSH 12C | SR 403 | Grays River (US 830) | Altoona | 1937 c 207 § 13: Grays River south |
| SSH 12C | North of Altoona | Eden | 1937 c 207 § 13: Eden west | |
| SSH 12D | SR 407 | Cathlamet (US 830) | State Camp | 1937 c 207 § 13: Cathlamet northeast |
| SSH 12E | SR 603 | Claquato (SR 6) | Toledo (I-5) | 1937 c 207 § 13: Chehalis to Toledo |
| SSH 12F | SR 409 | Cathlamet (US 830) | Puget Island | |
| SSH 12G | SR 402 | Grays River | Pe Ell | |
| SSH 12H | SR 411 | Kelso (US 830) | Vader (SR 506) | |
| PSH 13 | US 101 | Raymond (SR 6) | Aberdeen (US 410) | 1937 c 190 § 13: Raymond to Aberdeen |
| SSH 13A Raymond Branch (south of Twin Harbors State Park) |
SR 105 | Raymond (US 101) | Westport | 1937 c 207 § 14: Raymond to Westport |
| SSH 13A | SR 105 | Aberdeen (US 101) | Twin Harbors State Park (SR 105) | 1937 c 207 § 14: Aberdeen to Westport |
| PSH 14 | SR 16 | Gorst (SR 3) | Port Orchard (SR 160) | 1937 c 190 § 14: (north of) Shelton to Gig Harbor |
| PSH 14 Harper Branch |
SR 160 | Port Orchard (SR 16) | Point Southworth | 1937 c 190 § 14: Port Orchard to Harper |
| PSH 14 PT | SR 16 | Port Orchard (SR 160) | Tacoma (SR 509) | 1937 c 190 § 14: (north of) Shelton to Gig Harbor |
| PSH 14 | Union | Gorst | 1937 c 190 § 14: (north of) Shelton to Gig Harbor | |
| SSH 14A Purdy Branch |
SR 302 | Purdy (SR 16) | Allyn (SR 3) | |
| SSH 14A | SR 3 | Allyn (SR 302) | Belfair (SR 106) | 1937 c 207 § 15: Belfair to Shelton |
| SSH 14A | SR 3 | Allyn (SR 302) | Shelton (US 101) | 1937 c 207 § 15: Belfair to Shelton |
| SSH 14B | Purdy | Allyn | 1937 c 207 § 15: Purdy to Allyn; became part of SSH 14A (SR 302) in 1955 | |
| SSH 14C | Gig Harbor | Point Fosdick | 1937 c 207 § 15: Gig Harbor south; became part of PSH 14 PT in 1939 | |
| PSH 15 | US 2 | Peshastin (US 97) | Everett (I-5) | 1937 c 190 § 15: Peshastin to Everett |
| PSH 15 BM | SR 202 (SR 522) |
Monroe (US 2) | Woodinville (SR 522) | |
| SSH 15A | SR 204 | Everett (US 2) | Lake Stevens (SR 9) | 1937 c 207 § 16: Everett to Granite Falls |
| SSH 15A | SR 92 | North Lake Stevens (SR 9) | Granite Falls | 1937 c 207 § 16: Everett to Granite Falls |
| SSH 15B | SR 203 | Monroe (US 2) | Fall City (SR 522) | 1937 c 207 § 16: Monroe to Fall City |
| SSH 15C | SR 209 | Leavenworth (US 2) | Lake Wenatchee State Park (SR 207) | 1937 c 207 § 16: Leavenworth to Winton |
| SSH 15C | SR 207 | Lake Wenatchee State Park (SR 209) | Winton (US 2) | 1937 c 207 § 16: Leavenworth to Winton |
| SSH 15D | SR 207 | Lake Wenatchee State Park (SR 209) | Telma | 1937 c 207 § 16: Lake Wenatchee to Telma |
| PSH 16 | SR 153 | Pateros (US 97) | Twisp (SR 20) | 1937 c 190 § 16: Pateros to Barron |
| PSH 16 | SR 20 | Twisp (SR 153) | Mazama | 1937 c 190 § 16: Pateros to Barron |
| PSH 16 | SR 20 | Mazama | Avon (SR 536) | |
| PSH 16 Loup Loup Branch |
SR 20 | Twisp (SR 153) | Okanogan (US 97) | |
| PSH 16 | SR 20 | Southwest of Okanogan (SR 20) | Malott (US 97) | |
| PSH 16 | Mazama | Barron | 1937 c 190 § 16: Pateros to Barron | |
| SSH 16A | SR 20 | Okanogan (SR 20) | Omak (US 97) | |
| PSH 17 | Marblemount | Mazama | 1937 c 190 § 17: Twisp to Marblemount; became part of PSH 16 (SR 20) in 1961 | |
| PSH 17 | Stehekin | East of Marblemount | 1937 c 190 § 17: Stehekin northwest | |
| SSH 17A | Marblemount | Sedro-Woolley | 1937 c 207 § 17: Marblemount to Sedro-Woolley; became part of PSH 16 (SR 20) in 1961 | |
| PSH 18 | I-90, US 10 | George (SR 281) | Ritzville (US 395) | 1937 c 190 § 18: Burke to Ritzville |
| PSH 18 | SR 230 | Ritzville (I-90) | Ewan (SR 23) | |
| PSH 18 Sprague Ewan Steptoe Branch |
SR 23 | Ewan (SR 230) | Steptoe (US 195) | |
| PSH 18 Sprague Ewan Steptoe Branch |
SR 23 | Ewan (SR 230) | Sprague (I-90) | |
| PSH 21 | SR 106 | Union (US 101) | Belfair (SR 3) | |
| PSH 21 | SR 3 | Belfair (SR 106) | Gorst (SR 16) | |
| PSH 21 | SR 3 | Gorst (SR 16) | Hood Canal Bridge (SR 104) | 1937 c 190 § 19: Kingston to Port Orchard |
| PSH 21 | SR 104 | Hood Canal Bridge (SR 3) | Kingston | 1937 c 190 § 19: Kingston to Port Orchard |
| PSH 21 Navy Yard Branch |
SR 304 | Bremerton (SR 3) | Bremerton Ferry Terminal | |
| PSH 21 Keyport Branch |
SR 303 | Keyport | West of Keyport (SR 3) | 1937 c 190 § 19: Keyport west |
| SSH 21A | SR 305 | Poulsbo (SR 3) | Winslow | 1937 c 207 § 18: Poulsbo to Port Blakely |
| SSH 21B | SR 303 | Keyport | Bremerton (SR 304) | 1937 c 207 § 18: Keyport to East Bremerton |
| SSH 21B Illahee State Park Branch |
SR 306 | Bremerton (SR 303) | Illahee State Park | |
| SSH 21C | SR 300 | Belfair (SR 3) | Belfair State Park | |
| PSH 22 | SR 25 | Davenport (US 2) | British Columbia | 1937 c 190 § 20: Davenport to Kettle Falls, Kettle Falls to British Columbia |
| SSH 22A | SR 251 | Northport (SR 25) | British Columbia | 1937 c 207 § 19: Northport to British Columbia |
| Mount Spokane Park Drive | SR 206 | North of Spokane (US 2) | Mount Spokane State Park |
Other branches in 1960:
- PSH 1 Everett Loop: Evergreen Way and 41st Street? from SR 99 (PSH 1) to Broadway (PSH 1)
- PSH 1 Marysville Spur: SR 529 from I-5 (PSH 1) north of Everett to Ebey Slough?
- PSH 1 D Street Connection in Blaine: D Street and I-5 from SR 543 (PSH 1) to Canada
- SSH 1I Mukilteo Ferry Spur
- SSH 1W Edmonds Ferry Spur
- SSH 2D Redmond Spur, SSH 2D to PSH 2 in Redmond
- PSH 3 Pasco Spur: US 395 and I-182 from Lewis Street (PSH 3) to 4th Avenue (PSH 11)
- SSH 10B Crown Point Spur
- SSH 13A Tokeland Branch
- PSH 14 Manchester Branch: Harper Branch to Manchester
- PSH 15 Skykomish Connection: new PSH 15 to old PSH 15 in Skykomish
- PSH 21 Lofall Ferry Connection: PSH 21 to Lofall South Point Ferry
- SSH 21B Warren Avenue Route: PSH 21 Navy Yard Branch to SSH 21B via Warren Avenue Bridge