Castle is a town located in Garfield County, in the state of Colorado (CO), United States. Nestled in the Mountain division of the West region, it covers an area of 2.3 square miles (6.0 km²) and sits at an elevation of 5573 ft. With a population of approximately 1,984 residents, Castle offers a peaceful, rural atmosphere.
The town's population is composed of about 50% males and 50% females, and it has a population density of 851.50 people per square mile (328.77/km²). Castle lies at a latitude of 39.57 and a longitude of -107.53, operating in the UTC-7.
Locals reflect a blend of American ancestry, with roots primarily in United States (5.1%), followed by English (11.8%), German (25.9%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 81647.