Colby is a city located in Thomas County, in the state of Kansas (KS), United States. Nestled in the West North Central division of the Midwest region, it covers an area of 3.3 square miles (9.0 km²) and sits at an elevation of 3160 ft. With a population of approximately 5,450 residents, Colby offers a peaceful, rural atmosphere.
The town's population is composed of about 47.06% males and 52.94% females, and it has a population density of 631.74 people per square mile (630.02/km²). Colby lies at a latitude of 39.39 and a longitude of -101.05, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (5.6%), followed by English (12.4%), German (37.8%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 67701.