South Oroville, CA has a population of 3,481 and is the 8,071st largest city in the United States. The population density is 1,310 per sq mi which is 464% higher than the California average and 1346% higher than the national average. The median age in South Oroville is 29 which is approximately 21% lower than the California average of 36. In South Oroville, 52% of the population over 15 years of age are married, 76% speak English and 13% speak Spanish. 73% of South Oroville residents were born in California, 16% were born out of state, 0% were born outside of the United States and 10% were foreign born.