Joseph Nicholas Delahanty (October 18, 1875 in Cleveland, Ohio – January 29, 1936 in Cleveland, Ohio), was a professional baseball player who played outfielder in the major leagues from 1907 to 1909. He was one of five Delahanty brothers to play in the majors. Delahanty started his professional career in 1897. He had his breakthrough year in 1907, hitting .355 for Williamsport of the Tri-State League. In August, he was purchased by the St. Louis Cardinals. He became the team's regular left fielder the following season and played with them through 1909.