A stag is a mature male deer. The term is also used for a male animal castrated after the secondary sex characteristics have developed to such a point as to give it the appearance of a mature male.

Stag may also refer to:

• Fag stag a gay term
• San Sebastian Stags, of San Sebastian College - Recoletos of Manila
• South Devon Railway Leopard class, a South Devon Railway 4-4-0ST steam locomotive
• South Trafford Archaeological Group based in Greater Manchester
• Stag (Amy Ray album), a 2001 album by Amy Ray
• Stag (film), a 1997 film starring John Stockwell
• Stag (album), a 1996 album by The Melvins
• Stag Arms, a firearms manufacturer located in New Britain, Connecticut
• Stag (barque), a famous Nova Scotian clipper ship, built in 1854.
• Stag film, slang for pornographic movie
• Stag profit, made by an investor termed a "stag"
• Student Theatre at Glasgow, (often abbreiviated STaG) The University of Glasgow's Theatre Society
• Triumph Stag, a British car
• Stag party, a celebration for a man soon-to-be married

Stags may also refer to:

• Stags (Spider Riders), an anime villain

See also