ZIP code 18109 is in Allentown (90% of residents), in Lehigh County (99%) and Northampton County (1.2%), Pennsylvania. 10% of its residents live outside city limits. It is in Pennsylvania's 7th congressional district. Its state senate district is State Senate District 14; its state house districts are State House District 22 (90%), State House District 133 (8.9%) and State House District 135 (1.2%).
Officials serving now (members of Congress until January 3, 2027). Sources: Mayors: Open States (public domain); State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
8 voting precincts overlap ZIP 18109.
Map them, with each precinct's share of the ZIP's residents.
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ZIP 18109 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.