The 1927 Cal Aggies football team represented the Northern Branch of the College of Agriculture[note 1] in the 1927 college football season. The team was known as the Cal Aggies, California Aggies, and sometimes the Cal Aggies Mustangs. They competed in the Far Western Conference (FWC).[note 2]
The Aggies were led by head coach William L. "Billy" Driver in his fifth and last year at the helm. They played home games in Sacramento, California. The Aggies finished with a record of four wins, three losses and one tie (4–3–1, 1–1 FWC). The Aggies outscored their opponents 84–82 for the 1927 season, with three of their victories coming via shutout. In five years under coach Driver, the Aggies compiled a record of 18–23–3, a winning percentage of .443.