USS Fallon (APA-81) was a Gilliam-class attack transport that served with the US Navy during World War II.

Commissioned late in the war, she was initially assigned to transport duties and consequently did not participate in combat operations.

She returned to the west coast 28 May, made another voyage to Honolulu and Eniwetok carrying soldiers, and arrived at Pearl Harbor once more 9 August.

The attack transport carried servicemen eligible for discharge from Okinawa and Sasebo to San Diego between 23 September and 29 October 1945, then made another voyage to the Philippines to return veterans.

At San Francisco from 5 January 1946 to 16 February, and then at Pearl Harbor, she was prepared for use as a target ship in Operation Crossroads, the atomic weapons tests at Bikini Atoll.