Calistoga, CA has a population of 5,281 and is the 6,217th largest city in the United States. The population density is 2,033 per sq mi which is 775% higher than the California average and 2144% higher than the national average. The median age in Calistoga is 44 which is approximately 23% higher than the California average of 36. In Calistoga, 48% of the population over 15 years of age are married, 47% speak English and 46% speak Spanish. 46% of Calistoga residents were born in California, 16% were born out of state, 1% were born outside of the United States and 37% were foreign born.