James Christopher Delahanty (June 20, 1879 – October 17, 1953) was a second baseman in Major League Baseball. He played thirteen seasons with eight clubs: the Chicago Orphans (1901), New York Giants (1902), Boston Beaneaters (1904-05), Cincinnati Reds (1906), St. Louis Browns (1907), Washington Senators (1907-09), Detroit Tigers (1909-12), and Brooklyn Tip-Tops (1914-15). Born in Cleveland, Ohio, he batted and threw right-handed.
Delahanty was one of five brothers to become Major League Baseball players, including older brother Ed Delahanty. He played his first full season in 1904, in which he batted .285 with the Beaneaters. He was traded mid-season by the Senators to the Tigers in 1909 for Germany Schaefer and played in his only World Series that season, batting .346 with 4 RBI in 7 games against the Pittsburgh Pirates. He finished his playing career in the Federal League. In 1,186 career games, Delahanty had 1,159 hits with 19 home runs and 151 stolen bases.