Larkfield-Wikiup, CA has a population of 9,257 and is the 4,169th largest city in the United States. The population density is 1,744 per sq mi which is 650% higher than the California average and 1825% higher than the national average. The median age in Larkfield-Wikiup is 43 which is approximately 19% higher than the California average of 36. In Larkfield-Wikiup, 51% of the population over 15 years of age are married, 86% speak English and 10% speak Spanish. 68% of Larkfield-Wikiup residents were born in California, 22% were born out of state, 1% were born outside of the United States and 9% were foreign born.