Boundary Atlas

ZIP code 07090: Westfield, NJ

ZIP code 07090 is in Westfield, in Union County, New Jersey. It is in New Jersey's 7th congressional district. Its state senate districts are State Senate District 21 (100%) and State Senate District 22 (0.1%); its state house districts are Assembly District 21 (100%) and Assembly District 22 (0.1%).

31,056residents (2020 Census)
6.7 sq miland area
1cities and towns
1congressional district
26voting precincts

See it on the mapAll of New Jersey

City and county

City or townShare of ZIP residents
Westfield100%

CountyShare of ZIP residents
Union County100%

Town or county subdivisionShare of ZIP residents
Westfield town100%
Scotch Plains township0.1%

Congressional district

Congressional districtShare of ZIP residents
New Jersey's 7th congressional district (NJ-07)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 21100%
State Senate District 220.1%

State house districtShare of ZIP residents
Assembly District 21100%
Assembly District 220.1%

Voting precincts

26 voting precincts overlap ZIP 07090. Map them, with each precinct's share of the ZIP's residents.

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Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:07090")

ZIP 07090 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.