Pueblo, CO has a population of 108,385 and is the 274th largest city in the United States. The population density is 2,017 per sq mi which is 3952% higher than the Colorado average and 2127% higher than the national average. The median age in Pueblo is 37 which is approximately 2% higher than the Colorado average of 36. In Pueblo, 49% of the population over 15 years of age are married, 83% speak English and 16% speak Spanish. 68% of Pueblo residents were born in Colorado, 27% were born out of state, 1% were born outside of the United States and 4% were foreign born.