| Year: | 1917 |
| Team: | Williams Ephs |
| Sport: | football |
| Conference: | Independent |
| Record: | 7–0–1 |
| Head Coach: | Mysterious Walker |
| Hc Year: | 1st |
| Captain: | Henry M. Halsted Jr. |
| Stadium: | Weston Field |
The 1917 Williams Ephs football team represented Williams College as an independent during the 1917 college football season. In their first and only season under head coach Mysterious Walker, the Ephs compiled a record of 7–0–1. Quarterback Benny Boynton led the squad to its first undefeated record. Boynton scored all the points in a 9–6 defeat of Columbia.