USS Simpson (FFG-56) is an Oliver Hazard Perry-class guided missile frigate of the United States Navy, named for Rear Admiral Rodger W. Simpson.

Simpson was laid down at Bath Iron Works, Maine, on February 27, 1984, launched on August 31, 1984 and commissioned on 21 September 1985.

Simpson was deployed to the Persian Gulf in January 1988, as an escort to reflagged Kuwaiti oil tankers during the Iran-Iraq War. On April 17, 1988, Simpson took part in Operation Praying Mantis, the U.S. response to the mining of the frigate Samuel B. Roberts, which hit an Iranian M-08 mine on April 14, 1988.

On 18 April, Simpson, along with Wainwright and Bagley, destroyed Iranian naval and intelligence facilities on the oil platform Sirri in the Persian Gulf. Later that day, the ships encountered the Iranian Kaman Class (Combatte II type) missile patrol boat Joshan, which launched a Harpoon missile. Simpson immediately returned missile fire, striking Joshan in her superstructure. Joshan was then sunk by combined gunfire. Simpson was awarded the Joint Meritorious Unit Award and the Combat Action Ribbon for this operation, and the Armed Forces Expeditionary Medal for the deployment.

SIMPSON’S latest deployment was from October 2007 to April 2008. She participated in Counter Narco-Terrorism Operations in the Eastern Pacific and Caribbean Sea . During this deployment SIMPSON interdicted two go-fasts, two Self-Propelled Semi-Submersibles (SPSS), and one Logistics Support Vessel (LSV). This resulted in the interdiction of twenty-two tons of cocaine worth a street vale of almost half a billion dollars and the arrests of 15 Narco-Terrorists. She is currently homeported in Mayport , FL and is assigned to Destroyer Squadron Fourteen.