Penryn, CA has a population of 895 and is the 15,838th largest city in the United States. The population density is 488 per sq mi which is 110% higher than the California average and 439% higher than the national average. The median age in Penryn is 47 which is approximately 29% higher than the California average of 36. In Penryn, 80% of the population over 15 years of age are married, 86% speak English and 6% speak Spanish. 81% of Penryn residents were born in California, 16% were born out of state, 0% were born outside of the United States and 2% were foreign born.