ZIP code 07945: Mendham, NJ
ZIP code 07945 is in Mendham (50% of residents) and Brookside (9.4%), in Morris County, New Jersey. 40% of its residents live outside city limits. It is in New Jersey's 7th congressional district (89%) and New Jersey's 11th congressional district (11%). Its state senate district is State Senate District 25; its state house district is Assembly District 25.
See it on the mapAll of New Jersey
City and county
| City or town | Share of ZIP residents |
|---|---|
| Mendham | 50% |
| Brookside | 9.4% |
| County | Share of ZIP residents |
|---|---|
| Morris County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Mendham borough | 50% |
| Mendham township | 39% |
| Randolph township | 11% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| New Jersey's 7th congressional district (NJ-07) | 89% |
| New Jersey's 11th congressional district (NJ-11) | 11% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 25 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 25 | 100% |
Voting precincts
11 voting precincts overlap ZIP 07945. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
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:07945")
ZIP 07945 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.