The royal tern is found on both coasts of the Americas. In the east during the breeding season (April to July) it is primarily found from Texas to Virginia. There are scattered breeding records as far north as Long Island, New York, coastally as far south as French Guiana, and on several Caribbean islands. Isolated breeding sites have been found in Argentina. The wintering range in the east is from North Carolina south to Panama and the Guianas and throughout the Caribbean. The western population nests from California to Mexico and winters from California south to Peru. Argentinian breeders may disperse into Brazil.
