2018 Kentucky House of Representatives election

The 2018 Kentucky House of Representatives elections were held on November 6, 2018, as part of the biennial United States elections. All 100 of Kentucky's state representatives were up for reelection. In Kentucky, members of the House of Representatives serve two-year terms. Accordingly, they are up for reelection in both presidential and midterm election years.

Democrats, who had long been the dominant party at the state level in Kentucky, held a majority in the state house from 1922 to 2017. In 2016, Republicans made large gains in the chamber, winning a majority of 64 seats. Both parties flipped several seats in 2018, with Republicans grabbing six seats from the Democrats and Democrats taking eight from the Republicans, for a net gain of two Democratic seats. Many of the Democratic gains were in suburban areas, including around Louisville, Lexington, and Owensboro. Republicans made gains in some of Democrats' remaining rural districts, though they significantly underperformed in Appalachian Eastern Kentucky, where Democrats picked up multiple seats.

Several races were decided by extremely narrow margins. Four seats—Districts 13, 27, 91, and 96—were all decided by seven votes or fewer. Republicans ultimately maintained their majority in the chamber, winning 61 seats to the Democrats' 39.

Closest races
Seats where the margin of victory was under 10%:
 * 1) District 13, 0.008% gain
 * 2) District 88, 0.2% gain
 * 3) District 27, 0.04% gain
 * 4) District 81, 0.04%
 * 5) District 91, 0.04% gain
 * 6) District 96, 0.04% gain
 * 7) District 48, 1.4% gain
 * 8) District 33, 2%
 * 9) District 45, 2.34%
 * 10) District 74, 2.48%
 * 11) District 10, 3.34%
 * 12) District 72, 4.02% gain
 * 13) District 8, 4.62%
 * 14) District 22, 5.12%
 * 15) District 3, 6.64% gain
 * 16) District 29, 6.66% 
 * 17) District 20, 6.98% 
 * 18) District 15, 7.08%
 * 19) District 32, 7.14% gain
 * 20) District 11, 7.56% gain
 * 21) District 100, 7.76%
 * 22) District 47, 9.62%

Election results
All results are official and certified by the Kentucky State Board of Elections.