| Billy Reid | |
| Position: | Second baseman/Outfielder |
| Bats: | Left |
| Throws: | Right |
| Birth Date: | 17 May 1857 |
| Birth Place: | London, Canada West |
| Death Place: | London, Ontario, Canada |
| Debutleague: | MLB |
| Debutdate: | May 1 |
| Debutyear: | 1883 |
| Debutteam: | Baltimore Orioles |
| Finalleague: | MLB |
| Finaldate: | October 15 |
| Finalyear: | 1884 |
| Finalteam: | Pittsburgh Alleghenys |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .263 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 0 |
| Teams: |
|
William Alexander Reid (1857–1940) was a second baseman in Major League Baseball for the 1883 Baltimore Orioles and 1884 Pittsburgh Alleghenys of the American Association. He continued to play in the minor leagues through 1888.