Dennis Mannion
New Hampshire State Representative, District 725 since 2022. Lost re-election in 2026; leaves office in January 2027.
- In office
- 3 yrs
- Since 2022
- Bills became law
- 3
- 6 sponsored, 2025–2026 session
- Votes missed
- 0.2%
- Chamber median 5.8%
- With party
- 94%
- On votes splitting the parties
- Last margin
- −1.0
- Won 2024
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET
Committees
As of 2026-10.
- Judiciary · vice chair
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
Became law May 2026
Became law Aug 2025
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Mannion sits in the New Hampshire House of Representatives
Mannion is closer to the center than 83% of the chamber's Republicans.
Closest: Lorie Ball, Valerie McDonnell,
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:56 PM ET
With Mannion’s party
- Votes with the chamber's Republicans94%
- Cosponsorships of the other party's bills0%
Black tick: the average of Republicans in the New Hampshire House of Representatives.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Mannion’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.
| Date | Bill | Mannion | Rep. majority | Dem. majority | Result |
|---|---|---|---|---|---|
| Aug 19, 2026 | HB 221: enabling electric utilities to own, operate, and offer advanced nuclear resources, and… | Yes | Yes | No | Failed 152–167 |
| Aug 19, 2026 | HB 1337: repealing the New Hampshire council on autism spectrum disorders. | Yes | Yes | No | Failed 148–172 |
| Aug 19, 2026 | HB 1442: permitting classification of individuals based on biological sex under certain limited… | Yes | Yes | No | Passed 165–149 |
| Aug 19, 2026 | HB 1358: establishing a commission to study transitioning all public schools to public charter… | No | Yes | No | Failed 150–166 |
| Aug 19, 2026 | HB 1726: relative to the sale of surplus state-owned land and establishing a commission to study… | Yes | Yes | No | Failed 101–206 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Mannion was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.
Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Elections
Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.
| Year | Race | Result | Margin | Seat | +/− |
|---|---|---|---|---|---|
| 2026 | New Hampshire House of Representatives: State House District Rockingham 25 | Lost | — | R+19.0 | — |
| 2024 | New Hampshire House of Representatives, District 725 | Won | D+1.0 | — | — |
| 2022 | New Hampshire House of Representatives, District 725 | Won | D+1.1 | — | — |
Source: 99chambers results archive; 2026: civicAPI (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Seats Mannion has held
- New Hampshire House of Representatives, District 725 · since 2022
Source: 99chambers results archive
Who Mannion has run against
- Republican (R) · 2026 general, lost
- Joe Sweeney (R) · 2024 election, won
- Lorie Ball (R) · 2022 election, won
Source: 99chambers results archive; 2026: civicAPI (unofficial)
How we know Mannion
One person, matched across every source we use.
- Open States ocd-person/4568bf8a-b56b-43ec-a00f-718341eb6cb9
- Wikidata Q117405630
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:51 PM ET