| Number: | 4 |
| Type: | Grey Cup |
| Date: | November 30, 1912 |
| Stadium: | AAA Grounds |
| City: | Hamilton |
| Visitor Name: | Toronto Argonauts |
| Visitor Colour: | Toronto Argonauts |
| Home Name: | Hamilton Alerts |
| Visitor Coach: | Jack Newton |
| Home Coach: | Liz Marriott |
| Visitor Record: | 5–1 |
| Home Record: | 3–1 |
| Visitor1: | 0 |
| Visitor2: | 2 |
| Visitor3: | 0 |
| Visitor4: | 2 |
| Home1: | 2 |
| Home2: | 2 |
| Home3: | 7 |
| Home4: | 0 |
| Attendance: | 5,337 |
The 4th Grey Cup was played on November 30, 1912, before 5,337 fans at the AAA Grounds in Hamilton, Ontario.
The Hamilton Alerts defeated the Toronto Argonauts 11–4 to win their only Grey Cup.