| Larry Kopf | |
| Position: | Shortstop |
| Birth Date: | 3 November 1890 |
| Birth Place: | Bristol, Connecticut, U.S. |
| Death Place: | Hamilton County, Ohio, U.S. |
| Bats: | Switch |
| Throws: | Right |
| Debutleague: | MLB |
| Debutdate: | September 2 |
| Debutyear: | 1913 |
| Debutteam: | Cleveland Naps |
| Finalleague: | MLB |
| Finaldate: | June 16 |
| Finalyear: | 1923 |
| Finalteam: | Boston Braves |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .249 |
| Stat2label: | Home runs |
| Stat2value: | 5 |
| Stat3label: | Runs batted in |
| Stat3value: | 266 |
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William Lorenz "Larry" Kopf (November 3, 1890 – October 15, 1986) was a professional baseball player who played infielder in the Major Leagues from to . He would play for the Cleveland Indians, Philadelphia Athletics, Boston Braves and Cincinnati Reds. Best known for his part in the only double no hitter in major league history. Kopf led off the tenth inning with a line drive single, breaking up a full nine innings without a hit for either team. He later scored on a single by Jim Thorpe.
He was the brother of football coach Herb Kopf.