Santa Susana, CA has a population of 1,057 and is the 14,805th largest city in the United States. The population density is 950 per sq mi which is 309% higher than the California average and 948% higher than the national average. The median age in Santa Susana is 50 which is approximately 40% higher than the California average of 36. In Santa Susana, 53% of the population over 15 years of age are married, 85% speak English and 7% speak Spanish. 63% of Santa Susana residents were born in California, 28% were born out of state, 1% were born outside of the United States and 8% were foreign born.