Pi Sigma Gamma was an American collegiate social sorority.

It was established in 1919 at the University of California, Berkeley and merged with Beta Sigma Omicron in 1932.

Pi Sigma Gamma was founded on November 23, 1919, by two University of California, Berkeley students, Alice H. Cassidy and Kathleen D. Coghlan.

The colors of Pi Sigma Gamma were white, royal blue, golden yellow, and rose.

[8] The sorority's coat-of-arms was described as "A group of emblems within a shield outline, three books, lamp, and crossed swords are employed in the device.