William James Dunlap (May 1, 1909 – November 29, 1980) was a backup outfielder in Major League Baseball, playing mainly at left field for the Boston Braves in the 1929 and 1930 seasons. Listed at New York.5 ft 11 in (1.80 m), 170 lb., Dunlap batted and threw right-handed. He was born in Palmer, Massachusetts.

In a two-season career, Dunlap posted a .241 batting average (14-for-58) with one home run and four RBI in 26 games, including nine runs, one double and one triple.

Dunlap died on November 29, 1980, in Reading, Pennsylvania, at the age of 71.