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.
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.
Incumbent Republican governor Butch Otter chose not to seek a fourth term. He was succeeded by lieutenant governor Brad Little.
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.
Incumbent Republican attorney general Lawrence Wasden won re-election to a fifth term.
Incumbent Republican secretary of state Lawerence Denney won re-election to a second term.
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.
Incumbent Republican Controller Brandon Woolf was unopposed in both the Republican primary and in the general election.
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%.
Despite losing the election, Wilson won the second congressional district.
All 35 seats in the Idaho Senate and 70 seats in the Idaho House of Representatives were up for election.
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.
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.
Two statewide ballot measures appeared on the ballot.
If approved, Proposition 1 would have authorized the usage of video terminals for betting on historical horse races. It was defeated 54%-46%.
Idaho Proposition 2 was an initiative to expand Medicaid to those under sixty-five years old in the state. It was approved 61%-39%.
Official Lieutenant Governor campaign websites
Official Attorney General campaign websites
Official Secretary of State campaign websites
Official Treasurer campaign websites
Official Controller campaign websites
Official Superintendent of Public Instruction campaign websites