Los Alamitos (Spanish for ‘”The Little Cottonwoods”‘) is a city in Orange County, California. The city was incorporated in March 1960. The population was 11,449 at the 2010 census, down from 11,536 at the 2000 census. The adjacent unincorporated community of Rossmoor uses the same 90720 Zip Code in its mailing address, but is not part of the city. The Los Alamitos Race Course is named for the city, but lies in the neighboring city of Cypress.