Prunedale, CA has a population of 19,628 and is the 2,220th largest city in the United States. The population density is 426 per sq mi which is 83% higher than the California average and 370% higher than the national average. The median age in Prunedale is 39 which is approximately 8% higher than the California average of 36. In Prunedale, 61% of the population over 15 years of age are married, 58% speak English and 40% speak Spanish. 59% of Prunedale residents were born in California, 16% were born out of state, 2% were born outside of the United States and 24% were foreign born.