Patterson Rock is an insular rock 0.5 nautical miles (0.9 km) west of Cameron Island, in the Swain Islands. This region was photographed from the air by U.S. Navy Operation Highjump (1946–47), ANARE (1956) and the Soviet expedition (1956). The rock was included in a 1957 ground survey by C.R. Eklund, who named it for Acy H. Patterson, U.S. Navy, electrician at Wilkes Station, 1957.