Arvada, CO has a population of 113,532 and is the 248th largest city in the United States. The population density is 2,933 per sq mi which is 5791% higher than the Colorado average and 3137% higher than the national average. The median age in Arvada is 41 which is approximately 12% higher than the Colorado average of 36. In Arvada, 59% of the population over 15 years of age are married, 92% speak English and 4% speak Spanish. 52% of Arvada residents were born in Colorado, 42% were born out of state, 1% were born outside of the United States and 5% were foreign born.