Keystone, CO has a population of 877 and is the 15,976th largest city in the United States. The population density is 21 per sq mi which is 57% lower than the Colorado average and 77% lower than the national average. The median age in Keystone is 39 which is approximately 8% higher than the Colorado average of 36. In Keystone, 29% of the population over 15 years of age are married, 88% speak English and 11% speak Spanish. 5% of Keystone residents were born in Colorado, 76% were born out of state, 7% were born outside of the United States and 12% were foreign born.
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The population density in Keystone is 57% lower than Colorado.
The median age in Keystone is 8% higher than Colorado.
In Keystone 93.04% of the population is White.
In Keystone 0.68% of the population is Black or African American.