ZIP code 21030 is in Cockeysville (86% of residents), in Baltimore County, Maryland. 14% of its residents live outside city limits. It is in Maryland's 2nd congressional district. Its state senate districts are State Senate District 42 (78%), State Senate District 11 (22%) and State Senate District 10 (0.3%); its state house districts are State Legislative Subdistrict 42B (64%), State Legislative Subdistrict 11B (18%), State Legislative Subdistrict 42A (14%), State Legislative Subdistrict 11A (3.2%) and State Legislative District 10 (0.3%).
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).
18 voting precincts overlap ZIP 21030.
Map them, with each precinct's share of the ZIP's residents.
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ZIP 21030 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.