2018Flipped from RepublicanFinal resultsIncumbent defeated
2018 election for New Hampshire House of Representatives: Hillsborough 40
New Hampshire House of Representatives · New Hampshire
Kat McGhee (D) won with 50.9% of the vote, defeating Keith Ammon (R) by 4.3 points, flipping a seat Republicans held.
Kat McGheeDemocrat · winner
50.9%7,403
Keith AmmonRepublican · incumbent
46.7%6,783
Mark LinnIndependent
2.4%348
14,539 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)