Idaho's 21st legislative district

Idaho's 21st legislative district is one of 35 districts of the Idaho Legislature. It is currently represented by Regina Bayer (Republican), Steven Harris, (Republican), and Megan Kiska (Republican).

1984–1992
From 1984 to 1992, District 21 was a floterial district that contained Districts 14, 15, 16, 17, 18, 19, and 20. District 21 consisted of all of Ada County.

1992–2002
From 1992 to 2002, District 21 consisted of Blaine, Camas, Lincoln Counties a portion of Elmore and Gooding Counties.

2002–2012
From 2002 to 2012, District 21 consisted of a portion of Ada County.

2012–2022
District 21 currently consists of a portion of Ada County.