State legislatures › New Hampshire House
New Hampshire House District Hillsborough 39
2026 forecast · Updated October 22, 2026, 09:28 UTC
69% chance of a Democratic win · Ellen A. Boudreau (D), Jon DiPietro (R), William Infantine (R), Thomas Katsiantonis (D)
District Hillsborough 39 leans Democratic. Of its 19 neighbouring districts, 8 favour Democrats, 9 favour Republicans, 2 are competitive.
| Status | Elects 2: expected Democratic seats 1.0 |
|---|---|
| Chance of a Democratic win | 69% |
| Likely margin (80% range) | R+11 to D+12, middle even |
| Candidates | Ellen A. Boudreau (D), Jon DiPietro (R), William Infantine (R), Thomas Katsiantonis (D) |
| Candidate list from | civic guide |
| Current member | Mark Warden |
How it has voted
On its current lines. Legislative contests and the top-of-ticket vote inside the district.
Initial version. This model was tested on every state legislative election from 1994 to 2024 before publication, forecasting each as if it had not happened. It beat the simple rule “the party that holds the seat keeps it”, and its chamber seat counts were off by 2.9 seats on average (target: under 3). Districts with no two-party race last time are read from their own presidential vote, a change tested in advance that cut their average error from 17 to 13 points. It missed one of its five accuracy targets: in 2024, the calmest year on record, its ranges were wider than they needed to be (92% of results fell inside its 80% ranges; target: at most 88%). Treat the ranges as cautious. The full test record and code.