Newark, CA has a population of 44,677 and is the 915th largest city in the United States. The population density is 3,220 per sq mi which is 1286% higher than the California average and 3454% higher than the national average. The median age in Newark is 38 which is approximately 6% higher than the California average of 36. In Newark, 58% of the population over 15 years of age are married, 47% speak English and 24% speak Spanish. 55% of Newark residents were born in California, 9% were born out of state, 2% were born outside of the United States and 34% were foreign born.