Templeton, CA has a population of 7,525 and is the 4,926th largest city in the United States. The population density is 953 per sq mi which is 310% higher than the California average and 952% higher than the national average. The median age in Templeton is 45 which is approximately 25% higher than the California average of 36. In Templeton, 66% of the population over 15 years of age are married, 89% speak English and 9% speak Spanish. 72% of Templeton residents were born in California, 20% were born out of state, 0% were born outside of the United States and 8% were foreign born.