Silt, CO has a population of 2,996 and is the 8,823rd largest city in the United States. The population density is 1,771 per sq mi which is 3457% higher than the Colorado average and 1855% higher than the national average. The median age in Silt is 31 which is approximately 14% lower than the Colorado average of 36. In Silt, 59% of the population over 15 years of age are married, 72% speak English and 28% speak Spanish. 54% of Silt residents were born in Colorado, 32% were born out of state, 0% were born outside of the United States and 14% were foreign born.