Boundary Atlas

ZIP code 08691: Robbinsville, NJ

ZIP code 08691 is in Robbinsville Center (19% of residents), Yardville (3.0%) and Hamilton Square (1.4%), in Mercer County (99%) and Monmouth County (1.4%), New Jersey. 77% of its residents live outside city limits. It is in New Jersey's 3rd congressional district. Its state senate districts are State Senate District 14 (99%) and State Senate District 12 (1.4%); its state house districts are Assembly District 14 (99%) and Assembly District 12 (1.4%).

16,866residents (2020 Census)
24.2 sq miland area
4cities and towns
1congressional district
17voting precincts

See it on the mapAll of New Jersey

City and county

City or townShare of ZIP residents
Robbinsville Center19%
Yardville3.0%
Hamilton Square1.4%
Groveville0.8%

CountyShare of ZIP residents
Mercer County99%
Monmouth County1.4%

Town or county subdivisionShare of ZIP residents
Robbinsville township84%
Hamilton township14%
Upper Freehold township1.4%

Congressional district

Congressional districtShare of ZIP residents
New Jersey's 3rd congressional district (NJ-03)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1499%
State Senate District 121.4%

State house districtShare of ZIP residents
Assembly District 1499%
Assembly District 121.4%

Voting precincts

17 voting precincts overlap ZIP 08691. 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:08691")

ZIP 08691 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.