Boundary Atlas

ZIP code 18631: Mifflinville, PA

ZIP code 18631 is in Mifflinville, in Columbia County, Pennsylvania. It is in Pennsylvania's 9th congressional district. Its state senate district is State Senate District 27; its state house district is State House District 109.

1,122residents (2020 Census)
1.4 sq miland area
1cities and towns
1congressional district
1voting precincts

See it on the mapAll of Pennsylvania

City and county

City or townShare of ZIP residents
Mifflinville100%

CountyShare of ZIP residents
Columbia County100%

Town or county subdivisionShare of ZIP residents
Mifflin township100%

Congressional district

Congressional districtShare of ZIP residents
Pennsylvania's 9th congressional district (PA-09)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (PA-09)Daniel Meuser (R)202-225-6511100%
U.S. SenatorDavid McCormick (R)202-224-6324 · contact formstatewide
U.S. SenatorJohn Fetterman (D)202-224-4254 · contact formstatewide
State Senator (State Senate District 27)Lynda Culver (R)570-387-4267100%
State Representative (State House District 109)Robert Leadbeter (R)570-387-0246100%

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 27100%

State house districtShare of ZIP residents
State House District 109100%

Voting precincts

1 voting precinct overlap ZIP 18631. Map them, with each precinct's share of the ZIP's residents.

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Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

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ZIP 18631 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.