ZIP code 21040 is in Edgewood (99% of residents), in Harford County, Maryland. It is in Maryland's 1st congressional district. Its state senate districts are State Senate District 34 (96%) and State Senate District 7 (4.1%); its state house districts are State Legislative Subdistrict 34A (96%) and State Legislative Subdistrict 7B (4.1%).
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).
6 voting precincts overlap ZIP 21040.
Map them, with each precinct's share of the ZIP's residents.
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related_geographies(id="us:zcta:21040")
ZIP 21040 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.