13 Egeria (e-jeer'-ee-a) is a large Main belt asteroid.

It was discovered by A. de Gasparis on November 2, 1850, and was named by Urbain J. J. Le Verrier , whose computations led to the discovery of Neptune. Egeria was a goddess (other sources say a nymph) of Aricia , in Italy, and the wife of Numa Pompilius, second king of Rome.

Egeria occulted a star on January 8, 1992. The former's disc was determined to be quite circular (217×196 km).