Fred S. Mansfield
| Full name | Frederick S. Mansfield |
|---|---|
| Country |
 United States |
| Died | November 28, 1922 |
| Turned pro | 1884 (amateur tour) |
| Retired | 1899 |
| Singles | |
| Grand Slam Singles results | |
| US Open | QF (1886, 1887, 1889) |
Frederick S. Mansfield (died 1922) was an American tennis player active in the late 19th century.
Mansfield reached the quarterfinals of the U.S. National Championships in 1886, 1887 and 1889. He won the Canadian International Championships in 1891.