Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/NJ/MENDHAM

Mendham ZIP code, New Jersey

The ZIP code for Mendham, NJ is 07945, and its area codes are 973 and 862.

USPS city name
1 ZIP code
Population
4,973
Area codes
973, 862

Mendham in numbers

About 4,973 people live in Mendham, in 1,802 households. The median household income is $211,944 a year, 2.0 times the New Jersey median of $103,556 (US: $80,734). The median owner-occupied home is valued at $819,800 (80% above the New Jersey median), and median gross rent is $3,500+ a month. The median age is 46.5; 80.7% of adults 25 and over hold a bachelor's degree or higher (43.6% across New Jersey); the average commute takes 35 minutes.

Population4,973Mendham4,973
Households1,802Mendham1,802
Median age46.5Mendham46.5New Jersey40.1US 38.9
Median household income$211,944Mendham$211,944New Jersey$103,556US $80,734
Median home value$819,800Mendham$819,800New Jersey$454,400US $332,700
Median gross rent$3,500+Mendham$3,500+New Jersey$1,720US $1,413
Bachelor's degree or higher80.7%Mendham80.7%New Jersey43.6%US 35.7%
Mean commute34.5 minMendham34.5 minNew Jersey30.5 minUS 26.4 min
Population density839 / sq miMendham839 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Mendham borough. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Mendham

ZIP codes with the USPS city name Mendham
ZIP City Type Population Median income Median home
07945 Mendham , NJ Standard 9,690 $250,000+ $931,100

Map of Mendham ZIP codes

07945

The ZIP codes of Mendham, NJ, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Mendham

The nearest larger towns are Bernardsville (7,916 people, 2.6 mi), Basking Ridge (7,917 people, 4.7 mi) and Lyons (5,187 people, 6.5 mi).

Towns near Mendham
TownPopulationDistance
Bernardsville 7,916 2.6 mi
Peapack and Gladstone 2,571 4.6 mi
Basking Ridge 7,917 4.7 mi
Lyons 5,187 6.5 mi
Morristown 20,453 6.6 mi
Succasunna 9,799 6.8 mi
Millington 3,220 7.7 mi
Flanders 8,809 7.9 mi
The Hills 10,785 7.9 mi
Morris Plains 6,315 8.1 mi
Cedar Knolls 4,882 8.3 mi
Stirling 2,599 8.3 mi
Dover 18,563 8.4 mi
Ledgewood 5,377 8.8 mi

More nearby: every ZIP code in Morris County · New Jersey ZIP codes

Cite this page

zipcodes.pro. “Mendham, NJ ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/nj/mendham

Underlying data is public domain or openly licensed — sources, vintages and licences.