A general election was held in the U.S. state of Idaho on November 6, 2018. All of Idaho's executive officers were up for election as well as both of Idaho's two seats in the United States House of Representatives. Primary elections were held on May 15, 2018.
Federal offices United States House of Representatives
Both of Idaho's two seats in the United States House of Representatives were up for election in 2018.
In the first congressional district, Raúl Labrador did not seek reelection and unsuccessfully ran for governor. Former state senator and fellow Republican Russ Fulcher was elected to represent the district.
In the second congressional district, Mike Simpson ran for reelection and won comfortably.
Governor
Incumbent Republican governor Butch Otter chose not to seek a fourth term. He was succeeded by lieutenant governor Brad Little.
Lieutenant governor
Incumbent Republican lieutenant governor Brad Little did not run for re-election to a third full term, and instead ran for governor. Former state representative Janice McGeachin won the general election with nearly 60% of the votes.
Attorney general
Incumbent Republican attorney general Lawrence Wasden won re-election to a fifth term. Republican primary Nominee Lawrence Wasden, incumbent. Primary results
Democratic primary Nominee Bruce Bistline, attorney and Democratic nominee in 2014.
Primary results
General election Predictions SourceRankingAs ofGoverning magazineJune 4, 2018 Results
Secretary of state
Incumbent Republican secretary of state Lawerence Denney won re-election to a second term. Republican primary Nominee Lawerence Denney, incumbent. Primary results
Democratic primary Candidates Jill Humble, nurse. Joseph Chastain, tech consultant. Primary results
General election Predictions SourceRankingAs ofGoverning magazineJune 4, 2018 Debate + 2018 Idaho secretary of state election debate Date Host Moderator Link Republican DemocraticKey: Participant Absent Not invited Invited Withdrawn Lawerence Denney Jill Humble1 October 11, 2018 IdahoPTV Melissa Davlin Idaho PBS Results
Treasurer
Incumbent Republican state treasurer Ron Crane did not run for re-election to a sixth term. Former state representative Julie Ellsworth won the election unopposed as no Democrats filed to run for the race. Republican primary Candidates Julie Ellsworth, former state representative. Tom Kealey, Chicago Connection Restaurant Group owner and former certified public accountant. Vicky McIntyre, Ada County Treasurer. Debate + 2018 Idaho treasurer election Republican primary candidate debate Date Host Moderator Link Republican Republican RepublicanKey: Participant Absent Not invited Invited Withdrawn Julie Ellsworth Tom Kealey Vicky McIntyre1 April 19, 2018 KCTS Melissa DavlinCascade PBS
Primary results
General election
Controller
Incumbent Republican Controller Brandon Woolf was unopposed in both the Republican primary and in the general election. Republican primary Nominee Brandon Woolf, incumbent. Primary results
General election
Superintendent of public instruction
Incumbent Republican superintendent Sherri Ybarra won a second term by a 3% margin. As of 2026, this is the last time a statewide race in Idaho was decided by margin of less than 20%.
Democratic primary Candidates Cindy Wilson, teacher. Allen Humble, retired hospital surveyor. Primary results
Republican primary Candidates Sherri Ybarra, incumbent. Jeff Dillon, Wilder School Superintendent. Debate + 2018 Idaho superintendent of public instruction Republican primary debate Date Host Moderator Link Republican RepublicanKey: Participant Absent Not invited Invited Withdrawn Sherri Ybarra Jeff Dillon1 April 27, 2018 IdahoPTV Melissa Davlin Idaho PBS Primary results
General election Endorsements
Debate + 2018 Idaho superintendent of public instruction election debate Date Host Moderator Link Republican DemocraticKey: Participant Absent Not invited Invited Withdrawn Sherri Ybarra Cindy Wilson1 October 12, 2018 IdahoPTV Melissa Davlin Idaho PBS Results
By congressional district Despite losing the election, Wilson won the second congressional district. District Ybarra Wilson Representative 58% 42%Raúl Labrador (115th Congress)Russ Fulcher (116th Congress) 44% 56%Mike Simpson
State legislature
All 35 seats in the Idaho Senate and 70 seats in the Idaho House of Representatives were up for election.
Idaho Senate Party Before After Change Republican 29 28 1 Democratic 6 7 1 Total 35 35
Idaho House of Representatives Party Before After Change Republican 59 56 3 Democratic 11 14 3 Total 70 70
Judicial seats Supreme Court Incumbent Idaho Supreme Court Justice G. Richard Bevan was appointed by Governor Butch Otter in 2017 to succeed Daniel Eismann. He ran unopposed and secured a full term. Court of Appeals Two judges on the Idaho Court of Appeals ran for election.
Incumbent judge David Gratton has been serving since 2009 while Jessica Lorello was appointed by Governor Otter in 2017 to succeed John Melanson. Both of them ran unopposed and secured another term.
Ballot measures Two statewide ballot measures appeared on the ballot. Proposition 1
If approved, Proposition 1 would have authorized the usage of video terminals for betting on historical horse races. It was defeated 54%-46%. Proposition 2
Idaho Proposition 2 was an initiative to expand Medicaid to those under sixty-five years old in the state. It was approved 61%-39%.
See also Elections in Idaho Politics of Idaho Political party strength in Idaho
References
External links Candidates at Vote Smart Candidates at Ballotpedia Campaign finance at OpenSecrets
Official Lieutenant Governor campaign websites Kristin Collum (D) for Lt. Governor Janice McGeachin (R) for Lt. Governor
Official Attorney General campaign websites Lawrence Wasden (R) for Attorney General
Official Secretary of State campaign websites
Jill Humble (D) for Secretary of State
Official Treasurer campaign websites Julie Ellsworth (R) for State Treasurer
Official Controller campaign websites Brandon Woolf (R) for State Controller
Official Superintendent of Public Instruction campaign websites Sherri Ybarra (R) for Superintendent