Newark is a city in Alameda County, California, United States. It was incorporated as a city in September 1955. Newark is an enclave, surrounded by the city of Fremont. The three cities of Newark, Fremont, and Union City make up the Tri-City Area. Newark's population was 47,529 at the 2020 census making it the third largest city in the US named Newark after Newark, New Jersey, and Newark, Ohio.
Geography
The western edge of the city is near the southern end of the San Francisco Bay. State Route 84 runs through the city, and continues as the Dumbarton Bridge to cross the San Francisco Bay to reach Menlo Park. Interstate 880 serves as the eastern boundary with Fremont.

According to the United States Census Bureau, the city has a total area of , of which is land and , comprising 0.17%, is water.

History
Newark was named after Newark Castle, Port Glasgow, in Scotland by J. Barr Robertson.

Before it was settled by Europeans, Newark was home to the Ohlone Native American Peoples. The first European settlement in the area was by the Spanish missionaries of Mission San José, whose territory covered much of the present-day cities of Newark, Fremont, and Union City. In 1878 land belonging to Washington Township of Alameda County was purchased by The Pacific Land Investment Company and subdivided to form the town of Newark.
Newark was incorporated in September 1955.
Demographics
2010
The 2010 United States Census reported that Newark had a population of 42,574. The population density was . The racial makeup of Newark was 17,567 (41.3%) White, 2,002 (4.7%) Black, 279 (0.7%) Native American, 11,571 (27.2%) Asian, 621 (1.5%) Pacific Islander, 7,735 (18.2%) from other races, and 2,799 (6.6%) from two or more races. Hispanic or Latino of any race were 14,994 persons (35.2%).
The Census reported that 42,428 people (99.7% of the population) lived in households, 145 (0.3%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.
There were 12,972 households, out of which 5,643 (43.5%) had children under the age of 18 living in them, 7,832 (60.4%) were opposite-sex married couples living together, 1,716 (13.2%) had a female householder with no husband present, 786 (6.1%) had a male householder with no wife present. There were 659 (5.1%) unmarried opposite-sex partnerships, and 93 (0.7%) same-sex married couples or partnerships. 1,942 households (15.0%) were made up of individuals, and 705 (5.4%) had someone living alone who was 65 years of age or older. The average household size was 3.27. There were 10,334 families (79.7% of all households); the average family size was 3.60.
The age distribution of the population shows 10,799 people (25.4%) under the age of 18, 3,824 people (9.0%) aged 18 to 24, 12,697 people (29.8%) aged 25 to 44, 10,727 people (25.2%) aged 45 to 64, and 4,526 people (10.6%) who were 65 years of age or older. The median age was 35.4 years. For every 100 females, there were 99.3 males. For every 100 females age 18 and over, there were 96.8 males.
There were 13,414 housing units at an average density of , of which 12,972 were occupied, of which 8,942 (68.9%) were owner-occupied, and 4,030 (31.1%) were occupied by renters. The homeowner vacancy rate was 1.0%; the rental vacancy rate was 4.0%. 28,489 people (66.9% of the population) lived in owner-occupied housing units and 13,939 people (32.7%) lived in rental housing units.
2000
As of the census of 2000, there were 42,471 people, 12,992 households, and 10,341 families residing in the city. The population density was . There were 13,150 housing units at an average density of .
There were 12,992 households, out of which 40.2% had children under the age of 18 living with them, 62.2% were married couples living together, 11.6% had a female householder with no husband present, and 20.4% were non-families. 14.1% of all households were made up of individuals, and 4.2% had someone living alone who was 65 years of age or older. The average household size was 3.26 and the average family size was 3.59.
In the city, the age distribution of the population shows 27.3% under the age of 18, 9.5% from 18 to 24, 34.3% from 25 to 44, 21.2% from 45 to 64, and 7.8% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 101.4 males. For every 100 females age 18 and over, there were 99.2 males.





