| Charles Quinby | |
| Fullname: | Charles Fenton Mercer Spotswood Quinby |
| National Team: | United States |
| Strokes: | Breaststroke |
| Collegeteam: | U.S. Naval Academy |
| Birth Date: | October 6, 1899 |
| Birth Place: | Norfolk, Virginia |
| Death Place: | Englewood, Florida |
Charles Fenton Mercer Spotswood Quinby (October 6, 1899 – January 4, 1988) was an American competition swimmer who represented the United States at the 1920 Summer Olympics in Antwerp, Belgium.[1] Quinby competed in the qualifying heats of the men's 400-meter breaststroke; he finished fourth in his heat but did not advance.[2] [3]