California, MO has a population of 4,368 and is the 7,043rd largest city in the United States. The population density is 1,165 per sq mi which is 1249% higher than the Missouri average and 1186% higher than the national average. The median age in California is 37 which is approximately 3% lower than the Missouri average of 38. In California, 67% of the population over 15 years of age are married, 86% speak English and 14% speak Spanish. 76% of California residents were born in Missouri, 15% were born out of state, 1% were born outside of the United States and 8% were foreign born.