William Paul Coughlin (July 12, 1878 – May 7, 1943), was a Major League Baseball third baseman for the Washington Senators (1901–1904) and Detroit Tigers (1904–1908). Coughlin spent his entire adult life (1899–1943) playing and coaching baseball, as a major league player, minor league coach, and spending his last 23 years as the head baseball coach at Lafayette College, in Easton, Pennsylvania.