| William Brown | |
| Position: | First baseman / Catcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 1866 |
| Birth Place: | San Francisco, California |
| Death Place: | Philadelphia, Pennsylvania |
| Debutleague: | MLB |
| Debutdate: | May 10 |
| Debutyear: | 1887 |
| Debutteam: | New York Giants |
| Finalleague: | MLB |
| Finaldate: | May 20 |
| Finalyear: | 1894 |
| Finalteam: | St. Louis Browns |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .261 |
| Stat2label: | Home runs |
| Stat2value: | 6 |
| Stat3label: | Runs scored |
| Stat3value: | 236 |
| Teams: |
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William M. Brown (1866 – December 20, 1897[1]), nicknamed "Big Bill", was a Major League Baseball player who played infielder from -. He played for the New York Giants, New York Giants (PL), Philadelphia Phillies, Baltimore Orioles, and Louisville Colonels.
In 1895, Brown developed a problem with his lungs. He travelled to Hawaii, southern California, and Arizona in an effort to find a climate that would be more beneficial for his health, but his efforts were unsuccessful, and he died as a result of his condition at home in San Francisco in 1897.