Red Bluff, CA has a population of 14,065 and is the 2,979th largest city in the United States. The population density is 1,860 per sq mi which is 700% higher than the California average and 1953% higher than the national average. The median age in Red Bluff is 37 which is approximately 2% higher than the California average of 36. In Red Bluff, 48% of the population over 15 years of age are married, 89% speak English and 9% speak Spanish. 75% of Red Bluff residents were born in California, 19% were born out of state, 0% were born outside of the United States and 6% were foreign born.