Porterville is a city in the San Joaquin Valley, in Tulare County, California, United States. Porterville's population was 55,697 at the 2013 census. The city's population grew dramatically as the city annexed many properties and unincorporated areas in and around Porterville. Not included in the city's population is East Porterville. The Census found another 7,331 more residents living in East Porterville, giving the Porterville Urban Area a total of 63,028 residents. Porterville is considered part of the Census Bureau's designation of the Visalia-Porterville metropolitan statistical area. Porterville serves as a gateway to a vast mountain wonderland and recreational area of the Sequoia and Kings Canyon National Parks.