The 2018 Hawaii Senate elections took place as part of the biennial United States elections. Hawaii voters elected state senators in 13 of the state senate's 25 districts. State senators serve four-year terms in the Hawaii Senate.

A primary election on August 11, 2018, determined which candidates would appear on the November 6 general election ballot. Primary election results can be obtained from the State of Hawaii's Office of Elections website. A statewide map of Hawaii's state Senate districts can be obtained from the state's Office of Planning here, and individual district maps can be obtained from the state's Office of Elections here.

Following the 2016 state senate elections, Democrats gained complete control of the Senate, with all 25 members.

To claim control of the chamber from Democrats, the Republicans needed to gain 13 senate seats; the Republicans only managed to gain one seat, but returned to having a presence in the chamber after being shut out in the 2016 elections.

Summary of results by Senate district Districts not shown did not have an election until 2020. State Senate districtIncumbent PartyElected Senator Party1st1st Kaiali‘i Kahele Dem Kaiali‘i Kahele Dem3rd3rd Josh Green Dem Dru Kanuha Dem4th4th Lorraine Inouye Dem Lorraine Inouye Dem6th6th Roz Baker Dem Roz Baker Dem7th7th J. Kalani English Dem J. Kalani English Dem12th12th Brickwood Galuteria Dem Sharon Moriwaki Dem16th16th Breene Harimoto Dem Breene Harimoto Dem17th17th Clarence K. Nishihara Dem Clarence K. Nishihara Dem18th18th Michelle Kidani Dem Michelle Kidani Dem19th19th Jon Yoshimura Dem Kurt Fevella Rep21st21st Maile Shimabukuro Dem Maile Shimabukuro Dem23rd23rd Gil Riviere Dem Gil Riviere Dem24th24th Jill N. Tokuda Dem Jarrett Keohokalole Dem Source:

Predictions SourceRankingAs of Governing | October 8, 2018

Detailed results by State Senate district District 1 • District 3 • District 4 • District 6 • District 7 • District 12 • District 16 • District 17 • District 18 • District 19 • District 21 • District 23 • District 24__NOTOC__ Source:

District 1

District 3

District 4

The state of Hawaii does not report vote totals for uncontested races. Incumbent Democrat Lorraine Inouye was re-elected without opposition in the general election.

District 6

District 7

The state of Hawaii does not report vote totals for uncontested races. Incumbent Democrat J. Kalani English was re-elected without opposition in the general election.

District 12

District 16 The state of Hawaii does not report vote totals for uncontested races. Incumbent Democrat Breene Harimoto was re-elected without opposition in the general election.

District 17

District 18

District 19

District 21

District 23

The state of Hawaii does not report vote totals for uncontested races. Incumbent Democrat Gil Riviere was re-elected without opposition in the general election.

District 24

The state of Hawaii does not report vote totals for uncontested races. Democrat Jarrett Keohokalole was elected without opposition in the general election.

See also 2018 United States elections 2018 United States Senate election in Hawaii 2018 United States House of Representatives elections in Hawaii 2018 Hawaii gubernatorial election 2018 Hawaii House of Representatives election

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