Category:2003–04 in European rugby union by country

• 2003–04 in British rugby union (3 C)

E

• 2003–04 in English rugby union (4 C, 13 P)

F

• 2003–04 in French rugby union (4 C, 9 P)

G

• 2003–04 in German rugby union (1 P)

I

• 2003–04 in Irish rugby union (4 C, 8 P)
• 2003–04 in Italian rugby union (3 C, 5 P)

R

• 2003–04 in Romanian rugby union (1 C, 4 P)
• 2003 in Russian rugby union (1 P)
• 2004 in Russian rugby union (2 P)

S

• 2003–04 in Scottish rugby union (4 C, 7 P)
• 2003–04 in Spanish rugby union (1 C, 4 P)

W

• 2003–04 in Welsh rugby union (3 C, 6 P)