Live Oak, CA has a population of 17,749 and is the 2,438th largest city in the United States. The population density is 5,474 per sq mi which is 2255% higher than the California average and 5942% higher than the national average. The median age in Live Oak is 38 which is approximately 6% higher than the California average of 36. In Live Oak, 49% of the population over 15 years of age are married, 70% speak English and 26% speak Spanish. 61% of Live Oak residents were born in California, 20% were born out of state, 1% were born outside of the United States and 18% were foreign born.