Johnson Reef

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, aka South Johnson Reef, Chìguā Jiāo, Đá Gạc Ma, Chigua Reef, Gạc Ma Reef and Mabini reef