| Otto Reiser | |
| Fullname: | Otto Reiser |
| Birth Date: | 24 December 1884 |
| Birth Place: | Germany |
| Position: | Midfielder |
| Years1: | 1903–1904 |
| Clubs1: | BTuFC Britannia 1892 |
| Years2: | 1905–1918 |
| Clubs2: | Phönix Karlsruhe |
| Nationalyears1: | 1911 |
| Nationalteam1: | Germany |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
Otto Reiser (24 December 1884 - 1961) was a German international footballer who played for BTuFC Britannia 1892 and Phönix Karlsruhe.[1] He also won one cap for the Germany national team in 1911.[2]