ZIP code 03603 is in Charlestown (21% of residents), in Sullivan County, New Hampshire. 79% of its residents live outside city limits. It is in New Hampshire's 2nd congressional district. Its state senate district is State Senate District 8; its state house districts are State House District Sullivan 03 (100%) and State House District Sullivan 04 (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).
3 voting precincts overlap ZIP 03603.
Map them, with each precinct's share of the ZIP's residents.
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related_geographies(id="us:zcta:03603")
ZIP 03603 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.