| Merlin Kopp | |
| Position: | Outfielder |
| Bats: | Switch |
| Throws: | Right |
| Birth Date: | January 2, 1892 |
| Birth Place: | Toledo, Ohio |
| Death Place: | Sacramento, California |
| Debutleague: | MLB |
| Debutdate: | August 2 |
| Debutyear: | 1915 |
| Debutteam: | Washington Senators |
| Finalleague: | MLB |
| Finaldate: | September 29 |
| Finalyear: | 1919 |
| Finalteam: | Philadelphia Athletics |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .232 |
| Stat2label: | Home runs |
| Stat2value: | 1 |
| Stat3label: | Runs batted in |
| Stat3value: | 30 |
| Teams: | |
Merlin Henry Kopp (January 2, 1892 – May 6, 1960) was a Major League Baseball outfielder. He played the end of for the Washington Senators, then all of and for the Philadelphia Athletics.
Kopp also had an extensive minor league baseball career. In all, he played eighteen seasons professionally, from until . He spent most of his career with the St. Thomas Saints of the Canadian League (1911–15) and the Sacramento Senators of the Pacific Coast League (1920–28).