Palo Alto, California is located outside of the United States.
East Palo Alto ( abbreviated E.P.A. ) is a city in San Mateo County , California , United States . Palo Alto ( [ ˌpæloʊ_ˈæltoʊ ] ; [ ˈpalo ˈalto ] ; from palo , literally `` stick '' , colloquially `` tree '' , and alto `` tall '' ; meaning : `` tall tree '' ) is a charter city located in the northwest corner of Santa Clara County , California , in the San Francisco Bay Area of the United States . Palo Alto is one of the most expensive cities in the United States and its residents are amongst the highest educated in the country .