ZIP code 17057 is in Middletown (41% of residents) and Royalton (4.9%), in Dauphin County, Pennsylvania. 54% of its residents live outside city limits. It is in Pennsylvania's 10th congressional district. Its state senate district is State Senate District 15; its state house districts are State House District 106 (84%) and State House District 104 (16%).
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).
15 voting precincts overlap ZIP 17057.
Map them, with each precinct's share of the ZIP's residents.
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ZIP 17057 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.