Johnson Reef may refer to a number of maritime features in the Union Bank / Union Reefs of the Spratly Islands: Johnson North Reef, also known as North Johnson Reef, Collins Reef and other names Johnson South Reef, South Johnson Reef, Chìguā Jiāo, Đá Gạc Ma, Chigua Reef, Gạc Ma Reef and Mabini reef
See also Johnson South Reef Skirmish