electionsmcp › races › Pennsylvania State House District 42
Pennsylvania State House District 42
The current officeholder, the 2024 result, and a precinct-level model you can run yourself — built from how Pennsylvania actually voted.
Model Pennsylvania State House District 42 →
Current officeholder
Jen Mazzocco Democratic
2024 result
Democratic D+33.4
2024 votes cast
40,368
Office
State House
Precinct results — 2024 general
68 precincts reported in Pennsylvania State House District 42's 2024 general election. The twenty largest:
| Precinct | Winner | Margin | Votes |
|---|---|---|---|
| 42003-UPPER ST. CLAIR W 3 D 3W 3D 3 | Republican | R+5.0 | 1,141 |
| 42003-UPPER ST. CLAIR W 1 D 3W 1D 3 | Democratic | D+4.1 | 978 |
| 42003-UPPER ST. CLAIR W 2 D 3W 2D 3 | Democratic | D+11.9 | 874 |
| 42003-MT. LEBANON W 1 D 6W 1D 6 | Democratic | D+39.8 | 857 |
| 42003-UPPER ST. CLAIR W 4 D 1W 4D 1 | Democratic | D+6.5 | 843 |
| 42003-MT. LEBANON W 2 D 1W 2D 1 | Democratic | D+38.8 | 833 |
| 42003-UPPER ST. CLAIR W 2 D 1W 2D 1 | Democratic | D+12.0 | 791 |
| 42003-DORMONT D 5D 5 | Democratic | D+48.4 | 790 |
| 42003-MT. LEBANON W 4 D 7W 4D 7 | Democratic | D+47.1 | 772 |
| 42003-MT. LEBANON W 2 D 8W 2D 8 | Democratic | D+39.7 | 760 |
| 42003-MT. LEBANON W 3 D 2W 3D 2 | Democratic | D+38.4 | 760 |
| 42003-CASTLE SHANNON D 1D 1 | Democratic | D+36.8 | 741 |
| 42003-MT. LEBANON W 4 D 2W 4D 2 | Democratic | D+45.0 | 728 |
| 42003-MT. LEBANON W 3 D 7W 3D 7 | Democratic | D+25.1 | 721 |
| 42003-MT. LEBANON W 5 D 8W 5D 8 | Democratic | D+54.6 | 718 |
| 42003-DORMONT D 3D 3 | Democratic | D+48.4 | 706 |
| 42003-MT. LEBANON W 5 D 7W 5D 7 | Democratic | D+48.9 | 697 |
| 42003-MT. LEBANON W 1 D 1W 1D 1 | Democratic | D+28.5 | 694 |
| 42003-CASTLE SHANNON D 3D 3 | Democratic | D+16.4 | 684 |
| 42003-BALDWIN D 1D 1 | Democratic | D+18.6 | 676 |
All 68 precincts are modelable — open the race in the simulator and drill to precinct grain.
Find your district
Enter a ZIP code or a district (e.g. NC-4) to find your U.S. House district and who represents it.
Model Pennsylvania State House District 42 in five steps
- Set the candidates. Name the contenders for the Pennsylvania State House District 42 (or keep the generic Democrat / Republican defaults). The map starts from real 2024 results in every precinct.
- Apply a swing. Move vote share statewide, or by demographic cohort, with a slider. The map and the running tally recompute instantly.
- Model turnout. Mobilize or depress turnout for any group — turnout and persuasion are modeled separately, the way a real campaign thinks about them.
- Drill to precincts. Zoom from the state down to individual precincts and override any of them by hand.
- Roll up & share. Roll the result up to chamber control, then publish a shareable, frozen link to your scenario.
Open Pennsylvania State House District 42 in the simulator →
Frequently asked
Who represents Pennsylvania State House District 42?
Jen Mazzocco (Democratic) currently holds this State House seat.
What was the 2024 result in Pennsylvania State House District 42?
D+33.4 — 26,932 Democratic, 13,436 Republican, of 40,368 votes cast.
Can I model this race myself?
Yes — open it in the electionsmcp simulator and model vote-share swing and turnout from the real 2024 baseline, down to the precinct, then roll it up to chamber control.