Boundary Atlas

ZIP code 07823: Belvidere, NJ

ZIP code 07823 is in Belvidere (35% of residents), Brookfield (10%), Mountain Lake (7.0%) and Bridgeville (3.2%), in Warren County, New Jersey. 44% of its residents live outside city limits. It is in New Jersey's 7th congressional district. Its state senate district is State Senate District 23; its state house district is Assembly District 23.

7,102residents (2020 Census)
25.1 sq miland area
5cities and towns
1congressional district
13voting precincts

See it on the mapAll of New Jersey

City and county

City or townShare of ZIP residents
Belvidere35%
Brookfield10%
Mountain Lake7.0%
Bridgeville3.2%
Buttzville0.5%

CountyShare of ZIP residents
Warren County100%

Town or county subdivisionShare of ZIP residents
White township56%
Belvidere town35%
Liberty township8.4%
Hope township0.5%

Congressional district

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

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (NJ-07)Thomas H. Kean, Jr. (R)202-225-5361100%
U.S. SenatorAndy Kim (D)202-224-4744statewide
U.S. SenatorCory A. Booker (D)202-224-3224 · contact formstatewide
State Senator (State Senate District 23)Doug Steinhardt (R)908-835-0552100%
Assembly Member (Assembly District 23)Erik Peterson (R)908-238-0251100%
Assembly Member (Assembly District 23)John DiMaio (R)908-684-9550100%

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).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 23100%

State house districtShare of ZIP residents
Assembly District 23100%

Voting precincts

13 voting precincts overlap ZIP 07823. Map them, with each precinct's share of the ZIP's residents.

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ZIP 07823 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.