Billy Hamilton, American baseball player and manager (b. 1866)
William Robert Hamilton (February 16, 1866 – December 15, 1940), nicknamed Sliding Billy, was an American professional baseball player in Major League Baseball (MLB) during the 19th-century. He played for the Kansas City Cowboys, Philadelphia Phillies and Boston Beaneaters between 1888 and 1901.

Hamilton won the National League (NL) batting title twice and led the NL in stolen bases five times, eclipsing 100 on four occasions. He hit over .400 in 1894 and set the major league record for runs scored in a season with 198. His 914 stolen bases ranks third all time. A career .344 hitter, he was elected to the National Baseball Hall of Fame in 1961 via the Veterans Committee.