Gerhard Krohn Rollefson (1900–1955) was a professor of Chemistry at the University of California, Berkeley and a recipient of a Guggenheim Fellowship.

His dissertation concerned Ebullioscopic constant measurement of mixed liquid media.

Rollefson was a specialist in physical chemistry and studied the impact of X-ray radiation on a variety of materials.

[4] Rollefson published a book with Milton Burton in 1939: Photochemistry and the Mechanisms of Chemical Reactions.

Rollefson was a long-serving editor of Annual Reviews in Physical Chemistry.