Charles Wennergren
| Full name | Sven Charles Otto Wennergren |
|---|---|
| Born | 7 February 1889 Gothenburg, Sweden |
| Died | 3 January 1978 (aged 88) Linköping, Sweden |
| Plays | Right-handed |
| Singles | |
| WCCC | 1R (1913) |
| Olympic Games | 4R (1912) |
| Doubles | |
| Other doubles tournaments | |
| Olympic Games | QF (1912, 1924) |
| Mixed doubles | |
| Olympic Games | 1R (1924) |
| Team competitions | |
| Davis Cup | 2R (Europe) (1928) |
Sven Charles Otto Wennergren (7 February 1889 – 3 January 1978) was a Swedish tennis player who competed at the 1912 and 1924 Summer Olympics.