ZIP code 07940 is in Madison (92% of residents) and Florham Park (7.8%), in Morris County, New Jersey. It is in New Jersey's 11th congressional district. Its state senate districts are State Senate District 25 (92%), State Senate District 26 (7.8%) and State Senate District 21 (0.2%); its state house districts are Assembly District 25 (92%), Assembly District 26 (7.8%) and Assembly District 21 (0.2%).
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).
16 voting precincts overlap ZIP 07940.
Map them, with each precinct's share of the ZIP's residents.
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related_geographies(id="us:zcta:07940")
ZIP 07940 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.