Truby is a surname. Notable people with the surname include:
Chris Truby (born 1973), third baseman who played some of his career in Major League Baseball
Harry Truby (1870–1953), former professional baseball player who was an infielder in the Major Leagues from 1895 to 1896
Jason Truby (born 1973), American musician
John Truby, screenwriter, director and screenwriting teacher