| Bill Barnes | |
| Position: | Center fielder |
| Birth Date: | April 13, 1858 |
| Birth Place: | Shakopee, Minnesota |
| Death Place: | St. Paul, Minnesota |
| Bats: | Unknown |
| Throws: | Unknown |
| Debutleague: | MLB |
| Debutdate: | September 27 |
| Debutyear: | 1884 |
| Debutteam: | St. Paul Saints |
| Finalleague: | MLB |
| Finaldate: | October 13 |
| Finalyear: | 1884 |
| Finalteam: | St. Paul Saints |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .200 |
| Stat2label: | Hits |
| Stat2value: | 6 |
| Stat3label: | Home runs |
| Stat3value: | 0 |
| Teams: | |
William H. Barnes (April 13, 1858 – July 10, 1945) was a baseball player, playing as a center fielder in the 19th century. He played for the St. Paul Saints of the Union Association, a replacement team which began play near the end of the 1884 season. He was a native of Indianapolis, Indiana. In 8 games as the Saints' starting center fielder Barnes batted .200 (6-for-30) with two runs scored. In the field he recorded eight putouts, three errors, and participated in one double play.