Boundary Atlas

Mendham, New Jersey

Mendham is a borough in Morris County, New Jersey, with 4,981 residents in 2020. It is in New Jersey's 7th congressional district. Its state senate district is State Senate District 25; its state house district is Assembly District 25.

4,981residents (2020 Census)
5.9 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Morris County100%

Congressional district

Congressional districtShare of 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 25)Tony Bucco (R)973-627-9700100%
Assembly Member (Assembly District 25)Aura Dunn (R)973-206-1876100%
Assembly Member (Assembly District 25)Marisa Sweeney (Democratic)973-933-2124100%

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 residents
State Senate District 25100%

State house districtShare of residents
Assembly District 25100%

ZIP codes

Percentages mark ZIPs only partly in Mendham: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Mendham's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:3445330")

Mendham here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.