Oliver Walter Frey (September 7, 1887 – August 26, 1939) was an American lawyer, politician, and World War I veteran who served three terms as a Democratic member of the U.S. House of Representatives from Pennsylvania from 1933 to 1939.

Frey resumed his studies at the University of Pennsylvania and graduated from its law department in 1920.

Frey was elected as a Democrat to the Seventy-third Congress to fill the vacancy caused by the death of Henry Winfield Watson.

After his time in Congress he worked as general counsel for the Farm Credit Administration in Baltimore, Maryland, from April 1939 until his death.

This article incorporates public domain material from the Biographical Directory of the United States Congress