Challis is a city located in Custer County, in the state of Idaho (ID), United States. Nestled in the Mountain division of the West region, it covers an area of 1.8 square miles (5.0 km²) and sits at an elevation of 5288 ft. With a population of approximately 909 residents, Challis offers a peaceful, rural atmosphere.
The town's population is composed of about 49.5% males and 50.5% females, and it has a population density of 510.67 people per square mile (197.17/km²). Challis lies at a latitude of 44.5 and a longitude of -114.23, operating in the UTC-7.
Locals reflect a blend of American ancestry, with roots primarily in United States (7.8%), followed by English (16.9%), German (16.3%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 83226.