USS Signet (AM-302) was an Admirable-class minesweeper built for the United States Navy during World War II.

Signet was laid down on 8 April 1943 by Associated Shipbuilders at Harbor Island Seattle, Washington, and was launched on 16 August 1943; sponsored by Miss Bernice Moore, and commissioned on 20 June 1944.

Signet spent the summer of 1944 completing her fitting out and undergoing minesweeping trials, shakedown, and antisubmarine warfare training.

Over the next five months, the minesweeper made two voyages from Hawaii to Eniwetok Atoll in the Marshall Islands and one to San Francisco.

Upon her return to Hawaii from San Francisco, California, on 3 December, Signet began a three-week period of availability, followed by patrols and exercises in the islands.

The convoy arrived on 3 February and, after a day of logistics, Signet got underway for the Marianas en route to the Iwo Jima invasion.

Her crew rescued a downed American flier during evening of 21 February and watched the U.S. Marines hoist the colors on the summit of Mount Suribachi on the 23d.

On 4 March, Signet's crew began to understand the significance of Iwo Jima as they watched the first crippled B-29 land on its airfield.

On 7 March after a little more than three weeks of sweeping, patrolling, and being harassed by enemy planes Signet cleared Iwo Jima for Ulithi Atoll in the Carolines.

For the next three months, Signet swept mines, patrolled, screened transports, fought off air attacks, and supported ground troops.

Up until 7 April, her gun crews had to content themselves with watching their sister ships and combat air patrols splash Japanese planes.

In early June, she supported the landings at Iheya Shima to the northwest of Okinawa, then returned to minesweeping and anti-suicide boat patrol.

She returned to Okinawa on the 24th and remained there until the 30th when she got underway with a large group of minesweepers to help sweep the Yellow Sea in support of the Korea occupation forces.