Santee, CA has a population of 56,839 and is the 700th largest city in the United States. The population density is 3,409 per sq mi which is 1367% higher than the California average and 3663% higher than the national average. The median age in Santee is 38 which is approximately 5% higher than the California average of 36. In Santee, 58% of the population over 15 years of age are married, 85% speak English and 10% speak Spanish. 59% of Santee residents were born in California, 30% were born out of state, 1% were born outside of the United States and 10% were foreign born.