Rockvale, CO has a population of 511 and is the 19,408th largest city in the United States. The population density is 267 per sq mi which is 435% higher than the Colorado average and 194% higher than the national average. The median age in Rockvale is 40 which is approximately 10% higher than the Colorado average of 36. In Rockvale, 72% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 58% of Rockvale residents were born in Colorado, 41% were born out of state, 0% were born outside of the United States and 0% were foreign born.