Lenwood, CA has a population of 4,045 and is the 7,398th largest city in the United States. The population density is 1,746 per sq mi which is 651% higher than the California average and 1827% higher than the national average. The median age in Lenwood is 27 which is approximately 26% lower than the California average of 36. In Lenwood, 45% of the population over 15 years of age are married, 88% speak English and 12% speak Spanish. 77% of Lenwood residents were born in California, 16% were born out of state, 1% were born outside of the United States and 6% were foreign born.