Thornton CO is the 6th largest city in Colorado and about to become 5th largest. Thornton has a current population of just under 150,000 people and will likely grow to about 242,000 by 2065. Thornton has also become a destination for primary employers and regional retail has discovered Thornton as a successful base of operations. Builders and Developers have found Thornton to be a desired location for a variety of new housing opportunities. Thornton has a very diverse population with a wide range of socio-economic conditions for residents throughout the city. Thornton benefits from its proximity to downtown Denver, Denver International Airport, and the foothills of the beautiful Rocky Mountains, and offers both established neighborhoods, and newer, affordable homes, creating a safe, sought-after, and active environment with a wide variety of municipal services