Idaho's 8th legislative district is one of 35 districts of the Idaho Legislature. It is currently represented by Steven Thayn, Republican of Emmett, Terry Gestrin, Republican of Donnelly, and Dorothy Moon, Republican of Stanley.
From 1992 to 2002, District 8 consisted of Adams, Boise, and Valley counties and a portion of Idaho and Gem counties.
From 2002 to 2012, District 8 consisted of Clearwater, Idaho, Lewis, and Valley counties.
From 2012-2022 District 8 consisted of Boise, Custer, Gem, Lemhi, and Valley counties.
Currently, District 8 consists of Boise, Custer, Elmore, and Valley counties.