Joseph Nicholas Delahanty (October 18, 1875 in Cleveland, Ohio – January 29, 1936 in Cleveland, Ohio), was a professional baseball player who played outfielder and second baseman in the major leagues from 1907 to 1909.

He was one of five Delahanty brothers to play in the majors: the others were Ed, Frank, Jim, and Tom.

The previous record (four) had been established in 1901 by the Cross brothers: Amos, Lave, Joe and Frank.

After his baseball career ended, Delahanty worked in a sheriff's office.

This biographical article relating to an American baseball outfielder born in the 1870s is a stub.