Newark is a city located in Alameda County, California, in the United States. It was officially incorporated as a city in September 1955. Geographically, the city is an enclave, meaning it is entirely surrounded by the neighboring city of Fremont.
The city is part of the Tri-City Area, which consists of Newark, Fremont, and Union City. According to the 2020 census, Newark had a population of 47,529. This population count makes it the third largest city in the United States named Newark, following Newark, New Jersey, and Newark, Ohio.