Challis is a city located in Custer County Idaho. It is also the county seat of Custer County. With a 2020 population of 1,115, it is the 80th largest city in Idaho and the 9883rd largest city in the United States . Challis is currently growing at a rate of 1.09% annually and its population has increased by 3.15% since the most recent census, which recorded a population of 1,081 in 2010. Challis reached it's highest population of 1,115 in 2021. Spanning over 2 miles, Challis has a population density of 581 people per square mile.
The average household income in Challis is $35,332 with a poverty rate of 30.18%. The median rental costs in recent years comes to $529 per month, and the median house value is $139,200. The median age in Challis is 45.1 years, 52.7 years for males, and 43.5 years for females.