| Bill Kienzle | |
| Position: | Outfielder |
| Bats: | Left |
| Throws: | Left |
| Birth Date: | March 12, 1862 |
| Birth Place: | Philadelphia, Pennsylvania |
| Death Place: | Philadelphia, Pennsylvania |
| Debutleague: | MLB |
| Debutdate: | September 15 |
| Debutyear: | 1882 |
| Debutteam: | Philadelphia Athletics |
| Finalleague: | MLB |
| Finaldate: | August 7 |
| Finalyear: | 1884 |
| Finalteam: | Philadelphia Keystones |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .262 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 9 |
| Teams: |
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William H. Kienzle (March 12, 1862 – April 16, 1910) was a 19th-century Major League Baseball player. He played outfield for the 1882 Philadelphia Athletics in the American Association and the 1884 Philadelphia Keystones in the Union Association.