| Year: | 1921 |
| Team: | Southern Branch Cubs |
| Sport: | football |
| Conference: | Southern California Conference |
| Short Conf: | SCC |
| Record: | 0–5 |
| Conf Record: | 0–5 |
| Head Coach: | Harry Trotter |
| Hc Year: | 2nd |
| Stadium: | Moore Field[1] |
The 1921 Southern Branch Cubs football team represented the Southern Branch of the University of California in the 1921 college football season (later known as UCLA). The program, which was later known as the Bruins,[2] was in its third year of existence. The Cubs were coached by Harry Trotter and finished the season with a 0–5 record.[3]