Mark Gillen
Pennsylvania State Representative, District 128 since 2010. Ran in 9 elections between 2010 and 2024, winning 9. Re-elected in 2026. Next on the ballot in 2028.
- In office
- 16 yrs
- Since 2010
- Bills became law
- 0
- 5 sponsored, 2025–2026 session
- Votes missed
- 0.0%
- Chamber median 0.0%
- With party
- 89%
- On votes splitting the parties
- Last margin
- +7.5
- Won 2026
- Next election
- 2028
- Nov 7, 2028
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Veterans Affairs and Emergency Preparedness · republican chair
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
No bills in this list for the 2025–2026 session.
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Gillen sits in the Pennsylvania House of Representatives
Gillen is closer to the center than 38% of the chamber's Republicans.
Closest: Brian Smith, Russ Diamond, John Schlegel
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 5:00 PM ET
With Gillen’s party
- Votes with the chamber's Republicans89%
- Cosponsorships of the other party's bills35%
Black tick: the average of Republicans in the Pennsylvania House of Representatives.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Gillen’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.
| Date | Bill | Gillen | Rep. majority | Dem. majority | Result |
|---|---|---|---|---|---|
| Oct 19, 2026 | SB 908: An Act amending the act of August 15, 1961 (P.L.987, No.442), known as the Pennsylvania… | No | No | Yes | Passed 128–75 |
| Oct 19, 2026 | SB 1260: An Act providing for licensure of electrical contractors, electricians, residential… | No | No | Yes | Passed 116–87 |
| Oct 5, 2026 | HB 2380: An Act amending Title 66 (Public Utilities) of the Pennsylvania Consolidated Statutes, in… | Yes | No | Yes | Passed 116–86 |
| Sep 29, 2026 | HB 280: An Act amending the act of June 3, 1937 (P.L.1333, No.320), known as the Pennsylvania… | Yes | No | Yes | Passed 115–88 |
| Jun 15, 2026 | HB 2084: An Act amending the act of March 10, 1949 (P.L.30, No.14), known as the Public School… | No | No | Yes | Passed 119–83 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Gillen 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 | Pennsylvania House of Representatives, District 128 | Won | R+7.5 | R+17.4 | −9.9 |
| 2024 | Pennsylvania House of Representatives, District 128 | Won | — | R+17.4 | — |
| 2022 | Pennsylvania House of Representatives, District 128 | Won | — | R+15.3 | — |
| 2020 | Pennsylvania House of Representatives, District 128 | Won | — | — | — |
| 2018 | Pennsylvania House of Representatives, District 128 | Won | R+20.8 | — | — |
| 2016 | Pennsylvania House of Representatives, District 128 | Won | — | — | — |
| 2014 | Pennsylvania House of Representatives, District 128 | Won | — | — | — |
| 2014 | Pennsylvania House of Representatives, District 128 (primary) | Won | — | — | — |
| 2012 | Pennsylvania House of Representatives, District 128 | Won | — | — | — |
| 2010 | Pennsylvania House of Representatives, District 128 | Won | R+30.1 | — | — |
Source: 99chambers results archive; 2026: civicAPI (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $31.3K
- Spent
- $29.4K
- Cash
- $1.3K
Source: Pennsylvania Department of State filings through Jun 6, 2026Updated Nov 1, 2026, 1:41 AM ET
Campaign committees
Open committees can still raise and spend money.
| FRIENDS OF MARK M. GILLEN State | Active |
| MARK M. GILLEN State | Active |
| FRIENDS OF MARK M GILLEN State | Active |
| MARK M. GILLEN State | Active |
Source: Pennsylvania Department of State filings through Jun 6, 2026Updated Nov 1, 2026, 1:41 AM ET
Seats Gillen has held
- Pennsylvania House of Representatives, District 128 · since 2010
Source: 99chambers results archive
Who Gillen has run against
- Andrew Wagner (D) · 2026 election, won
- Douglas B. Metcalfe (D) · 2018 election, won
- Bryan P. Boughter (D) · 2010 election, won
Source: 99chambers results archive; 2026: civicAPI (unofficial)
How we know Gillen
One person, matched across every source we use.
- Open States ocd-person/cd92c819-d5aa-4df3-ba96-2315dbdf4555
- Wikidata Q6768674
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET