William Alexander O'Hara (August 14, 1883 – June 13, 1931) was a Major League Baseball outfielder. He started his professional baseball career in 1902 and played for the Baltimore Orioles from 1905 to 1908. He then played in the National League for the New York Giants and St. Louis Cardinals before finishing his career with the Toronto Maple Leafs.
Bill O'Hara
| Given name: | William Alexander O'Hara |
| Nicknames: | None |
| Primary Pos: | Centerfield |
| Hght/Wght: | 5'10" / 165 lbs |
| Bats/Throws: | L / R |
| Born: | Aug 14, 1881 in Toronto, ONCA |
| Died: | Jun 13, 1931 in Jersey City, NJ (49 years old) |
| Debut: | Apr 15, 1909 |