A gunrunner is someone who deals in arms trafficking.

Gunrunner or Gun Runner may also refer to:

• The Gun Runner (1928 film), an American silent film directed by Edgar Lewis
• Gun Runner (film), a 1949 film
• The Gun Runner (1956 film) or Santiago, a film starring Alan Ladd
• The Gun Runners, a 1958 film noir crime film by Don Siegel
• The Gun Runner, a 1969 action film
• The Gunrunner (film), a 1983 film starring Kevin Costner
• Gun Runners, a 2016 documentary film by Anjali Nayar

• Gun Runner (horse), a Thoroughbred racehorse
• Gunrunner (comics), a character in Tintin comics
• Terry and the Gunrunners, New Zealand comic book
• MQR-16 Gunrunner, a U.S. military rocket
• Project Gunrunner, a U.S. project to prevent weapons reaching Mexican cartels