| Team: | Ottawa Rough Riders |
| Year: | 1945 |
| Record: | 5–1 |
| Division Place: | 1st, IRFU |
| Coach: | Ross Trimble |
| Playoffs: | Lost in IRFU Final |
| Shortnavlink: | Other seasons |
The 1945 Ottawa Rough Riders finished in first place in the Interprovincial Rugby Football Union with a 5–1 record but lost the IRFU Finals to the Toronto Argonauts by a total point score of 33–18.
| Ottawa Rough Riders | 6 | 5 | 1 | 0 | 105 | 40 | 10 | |
| Toronto Argonauts | 6 | 5 | 1 | 0 | 92 | 44 | 10 | |
| 6 | 1 | 5 | 0 | 36 | 68 | 2 | ||
| 6 | 1 | 5 | 0 | 32 | 113 | 2 |
| Week | Date | Opponent | Result | Record | |
| 1 | Sept 22 | vs. Toronto Argonauts | L 9–11 | 0–1 | |
|---|---|---|---|---|---|
| 2 | Sept 29 | at Toronto Argonauts | W 8–6 | 1–1 | |
| 3 | Oct 6 | vs. Hamilton Tigers | W 19–10 | 2–1 | |
| 4 | Oct 13 | at Montreal Hornets | W 25–8 | 3–1 | |
| 5 | Oct 20 | vs. Montreal Hornets | W 28–5 | 4–1 | |
| 6 | Oct 27 | at Hamilton Tigers | W 16–0 | 5–1 |
| Round | Date | Opponent | Result | |
| IRFU Final #1 | Nov 3 | at Toronto Argonauts | L 8–27 | |
|---|---|---|---|---|
| IRFU Final #2 | Nov 10 | vs. Toronto Argonauts | W 10–6 |