Lakewood, CO has a population of 149,793 and is the 172nd largest city in the United States. The population density is 3,486 per sq mi which is 6902% higher than the Colorado average and 3748% higher than the national average. The median age in Lakewood is 38 which is approximately 5% higher than the Colorado average of 36. In Lakewood, 51% of the population over 15 years of age are married, 84% speak English and 11% speak Spanish. 48% of Lakewood residents were born in Colorado, 42% were born out of state, 1% were born outside of the United States and 9% were foreign born.