Berkeley, CA has a population of 118,585 and is the 235th largest city in the United States. The population density is 11,322 per sq mi which is 4772% higher than the California average and 12397% higher than the national average. The median age in Berkeley is 31 which is approximately 13% lower than the California average of 36. In Berkeley, 36% of the population over 15 years of age are married, 72% speak English and 8% speak Spanish. 45% of Berkeley residents were born in California, 33% were born out of state, 2% were born outside of the United States and 21% were foreign born.