Westcliffe, CO has a population of 399 and is the 20,900th largest city in the United States. The population density is 323 per sq mi which is 549% higher than the Colorado average and 257% higher than the national average. The median age in Westcliffe is 50 which is approximately 36% higher than the Colorado average of 36. In Westcliffe, 47% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 50% of Westcliffe residents were born in Colorado, 47% were born out of state, 2% were born outside of the United States and 1% were foreign born.