Pennsylvania's 12th congressional district (PA-12)
Pennsylvania's 12th congressional district (PA-12) covers parts or all of Allegheny County and Westmoreland County, and 97 ZIP codes (61 wholly inside it). Its 2020 population was 764,864. This is the map in force for the November 3, 2026 election.
Who represents PA-12
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (PA-12) | Summer L. Lee (D) | 202-225-2135 |
| U.S. Senator | David McCormick (R) | 202-224-6324 · contact form |
| U.S. Senator | John Fetterman (D) | 202-224-4254 · contact form |
Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in PA-12 |
|---|---|
| Allegheny County | 52% |
| Westmoreland County | 31% |
ZIP codes
Percentages mark ZIPs only partly in PA-12: the share of that ZIP's residents inside it.
- 15017 (28%)
- 15018
- 15020
- 15025
- 15028
- 15034
- 15035
- 15037
- 15045
- 15047
- 15063 (13%)
- 15068 (12%)
- 15083
- 15085
- 15088
- 15089 (18%)
- 15102 (100%)
- 15104
- 15106 (2.4%)
- 15110
- 15112
- 15120
- 15122
- 15123
- 15129 (99%)
- 15131
- 15132
- 15133
- 15135
- 15137
- 15139 (<0.1%)
- 15140
- 15145 (98%)
- 15146
- 15147 (7.5%)
- 15148
- 15201
- 15203
- 15204 (99%)
- 15205 (31%)
- 15206
- 15207
- 15208 (100%)
- 15210
- 15211
- 15212 (92%)
- 15213
- 15214 (76%)
- 15215 (<0.1%)
- 15216 (37%)
- 15217
- 15218 (54%)
- 15219
- 15220 (40%)
- 15221 (21%)
- 15222
- 15224
- 15226 (92%)
- 15227
- 15228 (2.2%)
- 15232
- 15233
- 15234 (18%)
- 15235 (9.6%)
- 15236 (100%)
- 15239
- 15241 (99%)
- 15243 (3.0%)
- 15260
- 15282
- 15290
- 15332 (19%)
- 15601 (1.9%)
- 15611
- 15615
- 15617
- 15623
- 15625
- 15626 (28%)
- 15632 (82%)
- 15636
- 15637
- 15640
- 15642
- 15644 (88%)
- 15647
- 15660
- 15663
- 15665
- 15668 (98%)
- 15672 (23%)
- 15675
- 15678
- 15679 (12%)
- 15691
- 15692
- 15698 (94%)
Towns
Adamsburg borough, Arona borough, Baldwin borough, Bethel Park municipality, Braddock borough, Brentwood borough, Bridgeville borough, Chalfant borough, Clairton municipality, Dravosburg borough, Duquesne city, East McKeesport borough, East Pittsburgh borough, Elizabeth borough, Elizabeth township, Export borough, Forward township, Glassport borough, Homestead borough, Irwin borough, Jeannette city, Jefferson Hills borough, Liberty borough, Lincoln borough, Madison borough, Manor borough, McKeesport city, Monroeville municipality, Mount Oliver borough, Munhall borough, Murrysville municipality, North Braddock borough, North Huntingdon township, North Irwin borough, North Versailles township, Penn borough, Penn township, Pitcairn borough, Pittsburgh city and Pleasant Hills borough and others.
Get this in your AI agent
Your agent can draw every precinct in PA-12, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:4212", children_level="precinct", include_districts=True)