Historical Overview

In Mendham Township streams tumble through hilly landscapes of historic homes and winding tree-lined roads. Try to imagine these hills and valleys as they existed 250 years ago. Listen to the buzz of sawmills, the bang of trip-hammers, the clang of anvils, and the hum of textile factories as they echo off the hills and resound through the valleys. These and similar industries were the foundation of Mendham Township’s colonial economy.

The first settlers were attracted to Mendham Township by the abundance of natural resources. Here they found water to power factories, trees for fuel, and rich deposits of ore. By 1748 the area housed iron forges, sawmills, and a gristmill along the North Branch of the Raritan River. This early settlement became known as Ralston, after the enterprising Ralston family.

Northeast of Ralston is India Brook, a tributary of the North Branch. In the woods beside this waterway are remains of iron mines, charcoal hearths, forges, kilns, a sawmill, and at least one distillery. The road that traversed this valley was abandoned long ago, leaving these sites relatively undisturbed.

On the eastern side of Mendham Township, brooks that formed the upper reaches of the Whippany River attracted settlers to the valley called Water Street or Waterville, later known as Brookside. Today Brookside is laced with tailraces, culverts, tunnels, and other conduits, which formed a complex water distribution system that powered gristmills, sawmills, and textile mills. Other industries along "The Street" included a tannery, shoe factory, glassworks, carpet mill, and iron works.

Deposits of iron ore, mica, and limestone also attracted many settlers. Limestone was quarried in Ralston for building material, or burned in one of fifteen kilns to produce lime for fertilizer and mortar.

Following the Civil War, Mendham Township’s industrial economy declined. Local industries found it difficult to compete with larger urban factories. The railroad, the great engine of 19th century economic prosperity, did not arrive in the Township until 1888. The Rockaway Valley Railroad (called "Rock-A-Bye-Baby" by those familiar with its unsteady ride) carried agricultural goods, coal, mail, and some passengers. The railroad’s presence never led to the development typical of the late 19th century suburbanization that so dramatically changed nearby communities such as Morristown and Madison. The railroad operated for only 25 years. The tracks were removed during World War I for salvage.

Though manufacturing declined in Mendham Township, many people still farmed. In fact, farming had been a major activity in the township since its settlement in the early 18th century. Names of prominent farming families are remembered to this day: Pitneys, Lorees, Ledells, and Guerins.

Despite the present-day transformation from a rural farming community to a residential suburb, Mendham Township retains its early character through its carefully preserved homes, farm buildings, and villages. These are living remnants of the township’s past. Here people worked where they lived in a natural setting, away from the "dark satanic mills" of the big city, pursuing economic independence - a portrait of Americana.

Geographical Overview

Mendham Township encompasses approximately 18 square miles in southwestern Morris County, including 17.78 square miles of land. The Township is part of the Greater New York–New Jersey metropolitan area and is located approximately 35 miles west of New York City, 28 miles northwest of Newark, and approximately 80 miles northeast of Philadelphia.

Residents enjoy convenient access to major regional highways, including Routes 24, 80, 202, 206, and Interstate 287. Passenger rail service is available through nearby NJ Transit stations, including the Morristown station.

Mendham Township is distinguished by its rural character, historic neighborhoods, preserved lands, parks, and extensive trail network. The Township contains more than 3,000 acres of open space and approximately 60 miles of hiking trails.

Demographic Overview

Mendham Township had a population of 6,016 according to the 2020 United States Census, an increase from 5,869 residents in 2010. The United States Census Bureau estimated the Township’s population at 6,075 as of July 1, 2025.

The Township contains approximately 2,064 households, with an average of 2.90 persons per household. Approximately 95.7% of occupied housing units are owner-occupied.

The median value of owner-occupied housing units was approximately $1,070,400 for the 2020–2024 reporting period. The Township’s median household income exceeded $250,000, and approximately 77.4% of residents age 25 and older held a bachelor’s degree or higher.

Statistics

Population—2020 Census: 6,016
Estimated Population—2025: 6,075
Registered Voters—November 2025: 5,108
Total Area: Approximately 18.01 square miles
Land Area: 17.78 square miles, or approximately 11,379 acres
Population Density: Approximately 338 residents per square mile
Households: Approximately 2,064
Median Owner-Occupied Home Value: $1,070,400
Median Household Income: More than $250,000
Open Space: More than 3,000 acres
Walking and Hiking Trails: Approximately 60 miles

Schools

Mendham Township School District Schools: 2

• Mendham Township Elementary School: Preschool–Grade 4
• Mendham Township Middle School: Grades 5–8

High School: Township students attend West Morris Mendham High School, located in Mendham Borough and operated by the West Morris Regional High School District.

Community Resources

Library: Mendham Township Library, 2 West Main Street, Brookside
Fire Companies: 2—Brookside Engine Company No. 1 and Ralston Engine Company No. 1
Emergency Medical Services: Mendham Township First Aid Squad
Hospital: Morristown Medical Center
Local News: Observer-Tribune/Morris Review
Historic Sites: Ralston General Store, Ralston Cider Mill, Brookside Historic District, and Ralston Historic District
Public Swimming: Brookside Beach
Public Skating: Seasonal outdoor skating at Brookside Beach, weather permitting
Rail Service: NJ Transit service from nearby Morristown and other regional stations
Regional YMCA: Randolph YMCA