Pierce, CO has a population of 966 and is the 15,375th largest city in the United States. The population density is 1,151 per sq mi which is 2212% higher than the Colorado average and 1171% higher than the national average. The median age in Pierce is 43 which is approximately 18% higher than the Colorado average of 36. In Pierce, 64% of the population over 15 years of age are married, 82% speak English and 18% speak Spanish. 58% of Pierce residents were born in Colorado, 39% were born out of state, 0% were born outside of the United States and 4% were foreign born.