Mount Shasta, CA has a population of 3,285 and is the 8,352nd largest city in the United States. The population density is 872 per sq mi which is 275% higher than the California average and 863% higher than the national average. The median age in Mount Shasta is 49 which is approximately 37% higher than the California average of 36. In Mount Shasta, 51% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 69% of Mount Shasta residents were born in California, 29% were born out of state, 1% were born outside of the United States and 1% were foreign born.