Pohnpei (pōn´pā), state and island (1991 est. pop. 52,000), 129 sq mi (334 sq km), W Pacific, in the E Caroline Islands. It is one of four states comprising the Federated States of Micronesia. A volcanic island, Pohnpei is a flat dome of black basaltic rock, rising to 2,595 ft (791 m), with a rim of fertile coastal land. The national capital, Palikir, is in NW Pohnpei. Copra, dried bonito, and handicrafts are the chief products. Ruins of ancient stone walls, dikes, and basaltic columns dot the island. Pohnpei was formerly called Ponape and Ascension Island.