Thornton URL: https://knowledge.ivjn.us/en/places/co-thornton.html Thornton is a city in Colorado, United States. ## Overview Thornton is a city in [Colorado](https://knowledge.ivjn.us/en/places/colorado.html), United States, with a population of about 133,451[^geonames]. ## Geography - Coordinates: 39.8680, -104.9719 Updated: 2026-10-29 Relations: - Located in: Adams County https://knowledge.ivjn.us/en/places/co-adams-county.html Sources: - GeoNames US dataset (US.txt / admin2Codes.txt) https://download.geonames.org/export/dump/US.zip