USS Pollux (AKS-4) was a Castor-class general stores issue ship commissioned by the U.S. Navy for service in World War II.

The third ship to be named Pollux by the Navy, AKS–4 was laid down by the Federal Shipbuilding and Dry Dock Co., Kearney, New Jersey as SS Nancy Lykes for Lykes Brothers Steamship Company, 2 October 1941; launched 5 February 1942; acquired by the Navy 19 March; transferred to the Robins Dry Dock and Repair Company, Brooklyn, New York, for conversion; and commissioned 27 April 1942.

She supplied forces afloat and Allied bases at Guantánamo Bay, Cuba; St. Thomas, Virgin Islands; San Juan, Puerto Rico; Trinidad and Jamaica, West Indies; Colón, Panama Canal Zone; Recife and Bahia, Brazil; and Bermuda.

During this period she made numerous trips replenishing her stores from Sydney and Brisbane, Australia; Espiritu Santo, New Hebrides; and Oakland, California.

With the outset of the Vietnam War, Pollux served almost continually in the South China Seas supplying the various task groups of the U.S. 7th Fleet.