William Dayton "Pol" Perritt (August 30, 1891 – October 15, 1947), sometimes referred to as Poll Perritt or Polly Perritt, was an American baseball pitcher. He played professional baseball for ten years from 1912 to 1921. Perritt also briefly played for the Detroit Tigers in 1921. Over the course of 10 major league seasons, he appeared in 256 games and compiled a 92–78 record with a 2.89 ERA.