Hagerman is a city in Gooding County, Idaho, United States. The population was 968 at the 2020 census, up from 872 in 2010. The area is noted for its fossil beds and the Thousand Springs of the Eastern Snake River Plain Aquifer. Hagerman is home to a national fish hatchery, a university research station, and extensive aquaculture, assisted by an abundance of geothermal water for temperature regulation.