| Team: | Ottawa Rough Riders |
| Year: | 1915 |
| Record: | 2–3 |
| League Place: | 3rd, IRFU |
| Coach: | Frank Shaughnessy |
| Playoffs: | Did not qualify |
| Next: | 1919 |
| Shortnavlink: | Other seasons |
The 1915 Ottawa Rough Riders finished in third place in the Interprovincial Rugby Football Union with a 2–3 record and failed to qualify for the playoffs.
| Hamilton Tigers | 6 | 6 | 0 | 0 | 125 | 23 | 12 | |
| 5 | 3 | 2 | 0 | 69 | 49 | 6 | ||
| 5 | 2 | 3 | 0 | 54 | 50 | 4 | ||
| 6 | 0 | 6 | 0 | 10 | 136 | 0 |
| Week | Date | Opponent | Result | Record | |
| 1 | Oct 9 | at Montreal Football Club | W 18–2 | 1–0 | |
|---|---|---|---|---|---|
| 2 | Oct 16 | vs. Montreal Football Club | W 20–5 | 2–0 | |
| 3 | Oct 23 | at Toronto Argonauts | L 9–17 | 2–1 | |
| 4 | Oct 30 | vs. Hamilton Tigers | L 5–19 | 2–2 | |
| 5 | Nov 6 | vs. Toronto Argonauts | L 15–19* | 2–2 | |
| 6 | Nov 13 | at Hamilton Tigers | L 2–7 | 2–3 |
(*) The November 6 game won by Toronto over Ottawa was called because of darkness and protested by Ottawa. IRFU executives upheld the protest and declared the game no-contest.[1]