Paul Birch (born January 13, 1912, Atmore, Alabama – died May 24, 1969, St. George's, Grenada) was an American actor of stage and film.

Birch was born Paul Smith in Atmore, Alabama. He was a veteran of 39 movies, 50 stage dramas and a number of television shows including the Hallmark Hall of Fame (1951). In the late 1950s he starred, along with William Campbell, in the syndicated Canadian series Cannonball (1958), a half-hour drama/adventure show about truckers. He was the original "Marlboro Man" in TV commercials and played both Union General Ulysses S. Grant and Confederate General Robert E. Lee in several historical plays.