John Decker

John Decker may refer to:


 * John Decker (artist) (1895–1947), painter, set designer and caricaturist in Hollywood
 * John Decker (fire chief) (1823–1892), American businessman, politician and firefighter
 * John A. Decker (died 2006), Chief Judge of the Wisconsin Court of Appeals
 * Jon Decker, White House correspondent for Fox News Radio