Idaho's 31st legislative district is one of 35 districts of the Idaho Legislature. It is currently represented by Steve Bair, Republican of Blackfoot,[1] Neil Anderson, Republican of Blackfoot, and Julie VanOrden, Republican of Pingree.[2]
District 31 currently consists of all of Bingham County.[3]
| Legislature | Session | Senate | House Seat A | House Seat B |
| 62nd (2012 - 2014) | 1st | Steve Bair (R) | Neil Anderson (R) | Julie VanOrden (R) |
| 2nd | ||||
| 63rd (2014 - 2016) | 1st | |||
| 2nd | ||||
| 64th (2016 - 2018) | 1st | |||
| 2nd | ||||
| 65th (2018 - 2020) | 1st | Julianne Young (R) | ||
| 2nd | ||||
| 66th (2020 - 2022) | 1st | David Cannon (R) | ||
| 2nd |
From 2002 to 2012, District 31 consisted of all of Bear Lake, Caribou, Franklin, and Oneida Counties and a portion of Bannock County.
| Legislature | Session | Senate | House Seat A | House Seat B |
| 57th (2002 - 2004) | 1st | Robert L. Geddes (R) | Larry Bradford (R) | Eulalie Teichert Langford (R) |
| 2nd | ||||
| 58th (2004 - 2006) | 1st | Thomas Loertscher (R) | ||
| 2nd | ||||
| 59th (2006 - 2008) | 1st | |||
| 2nd | ||||
| 60th (2008 - 2010) | 1st | Marc Gibbs (R) | ||
| 2nd | ||||
| 61st (2010 - 2012) | 1st | John Tippets (R) | ||
| 2nd |
From 1992 to 2002, District 31 consisted of all of Butte County and portion of Bingham County.
| Legislature | Session | Senate | House Seat A | House Seat B |
| 51st (1992 - 1994) | 1st | Jerry Twiggs (R) | Allan Larsen (R) | Mike Simpson (R) |
| 2nd | ||||
| 52nd (1994 - 1996) | 1st | |||
| 2nd | ||||
| 53rd (1996 - 1998) | 1st | Dennis Lake (R) | ||
| 2nd | ||||
| 54th (1998 - 2000) | 1st | Stan Williams (R) | ||
| 2nd | Stan Williams (R) | Thomas Moss (R) | ||
| 55th (2000 - 2002) | 1st | |||
| 2nd | Janet Arave Aikele (R) |