Chico, CA has a population of 89,377 and is the 363rd largest city in the United States. The population density is 2,686 per sq mi which is 1056% higher than the California average and 2865% higher than the national average. The median age in Chico is 30 which is approximately 17% lower than the California average of 36. In Chico, 41% of the population over 15 years of age are married, 85% speak English and 9% speak Spanish. 73% of Chico residents were born in California, 18% were born out of state, 1% were born outside of the United States and 8% were foreign born.