Romeo, CO has a population of 340 and is the 21,788th largest city in the United States. The population density is 1,458 per sq mi which is 2828% higher than the Colorado average and 1509% higher than the national average. The median age in Romeo is 31 which is approximately 15% lower than the Colorado average of 36. In Romeo, 44% of the population over 15 years of age are married, 52% speak English and 48% speak Spanish. 79% of Romeo residents were born in Colorado, 16% were born out of state, 0% were born outside of the United States and 6% were foreign born.