12

Twelve or 12 may refer to:

Years

12: The Elements of Great Managing, a 2006 business book by Rodd Wagner and James K. Hartjker
Age 12, 2012 manga by Nao Maita
Twelve (novel), 2002 novel by Nick McDonell
Twelve, a 2007 novel by Lauren Myracle, part of The Winnie Years
Twelve (publisher), an imprint of Grand Central Publishing
Twelve, a 2009 novel by Jasper Kent

Twelve (company), a chemical technology company in Berkeley, California
Twelve (Street Fighter), a video game character from the Street Fighter series
iOS 12, an operating system by Apple
12 Victoria, an asteroid in the asteroid belt
12, a slang term for law enforcement
Tatra 12, a mid-size car
Rover 12, various mid-size cars produced by Rover
Renault 12, a mid-size family car
Line 12, various rapid transit lines.