Homes for Sale in Thornton, CO

Thornton has an estimated 147,766 residents (Census Bureau, July 2025), the sixth-largest city in Colorado. That is up from 141,867 in the 2020 Census.

The median sale price is about $545,000, up 2.3% from a year earlier (second quarter 2026). The Census median owner-occupied home value is $517,500.

Thornton's overall cost of living index is about 121.3 where the U.S. average is 100, roughly 21% above the national average. Housing index is 160.3, and a two-bedroom rental averages about $2,070 a month.

A single largest neighborhood has not been confirmed. Eastlake, Trailside, Todd Creek and Heritage are among the best-known neighborhoods.

Niche gives Thornton a C for crime and safety. Reported assault runs 143.3 per 100,000 residents and motor vehicle theft 490.9. For the first half of 2025, the Common Sense Institute counted 71 violent crimes per 100,000 residents.

Niche grades Thornton B+ overall. It ranks #3 among Best Places to Live in Adams County and #6 among Most Diverse Suburbs in Colorado.

Median household income is $103,088, and about 11% of residents are 65 or older.