Town guide · Somerset County
Living in Warren, NJ
Warren Township spreads across the Watchung Mountains in Somerset County. The Second Watchung Mountain splits the town in two, with the Washington Valley to the south and land sloping toward the Passaic River to the north, and Interstate 78 running across the top.
- County
- Somerset
- Population
- About 15,900 (2020 census)
- Size
- About 20 square miles
- Setting
- Suburban township on wooded ridges and valleys
- Main roads
- Interstate 78 (Exits 33, 36 and 40) and County Routes 525, 527, 531 and 651
Neighborhoods
A township of old crossroads villages
Warren was formed in 1806 and named for General Joseph Warren, the Revolutionary War patriot killed at Bunker Hill. In 1872 the southeastern half split off as North Plainfield Township, which is today Green Brook. The Second Watchung Mountain runs east and west through the middle of town. The southern half sits in the Washington Valley between the First and Second Watchung Mountains, and the northern half slopes toward the Passaic River and the Dead River.
- Warrenville: One of the township's old crossroads names, still used for Warrenville Road.
- Mount Bethel: A village at King George Road and Mountainview Road.
- Washington Valley: The southern half of the township, between the two Watchung ridges, where the East Branch of the Middle Brook runs.
- Other named areas: Older place names still in use include Dock Watch Hollow, Gallia, Round Top, Smalleytown, Springdale and Union Village.
Homes
What you will find
- Single family homes: Detached houses on the ridges and in the valleys on both sides of the Second Watchung Mountain.
- Homes on septic: Many homes are not on the township sewer system and use their own septic systems.
- Historic properties: The township protects several historic sites, including the Baker Duderstadt Farm and the Kirch Ford House, both on the National Register of Historic Places.
Worth knowing: Warren has its own sewer system, with three treatment plants and about 130 miles of sewer line, but many homes are not connected and rely on private septic systems. Sewer customers pay separate sewer fees. Before we price a Warren home, we confirm whether it is on sewer or septic, because it affects inspections, upkeep and what buyers will ask.
Property taxes
What taxes look like in Warren
- 1.841%2025 effective tax rate, as a share of market value
- $16,9992025 average residential tax bill
A home worth $900,000 on today's market would pay roughly $16,569 a year at Warren's 2025 effective rate. Your actual bill depends on your assessment, so we pull the real tax record for any home you are considering.
Source: New Jersey Division of Taxation, 2025 general and effective tax rates. Rates are set each year.
Getting around
Roads and commuting
Interstate 78 runs about 6.7 miles across the northern part of the township, with Exit 33 at County Route 525 on the Bernards line, Exit 36 at County Route 651 (King George Road) and Exit 40 at County Route 531 toward Watchung and the Plainfields. County Routes 525, 527 and 531 also cross the township. There is no train station in Warren. The closest NJ Transit stations are Berkeley Heights, Gillette and Stirling, with service to New York Penn Station and Hoboken.
Places worth knowing
Parks, landmarks and open space
- East County Park: About 150 acres of Somerset County parkland with woods, meadows, a half mile loop trail around a pond, a leash free dog area and athletic fields.
- Wagner Farm Arboretum: A 92.6 acre former dairy farm on Mountain Avenue, bought by the township in 2001, with a community garden and a children's garden.
- Warrenbrook Golf Course and Pool: A Somerset County Park Commission golf course and outdoor pool on Warrenville Road.
Common questions
Questions people ask us about Warren
What are property taxes in Warren, NJ?
Warren Township's 2025 effective tax rate is 1.841 percent of market value, and the average residential tax bill is $16,999, according to the New Jersey Division of Taxation. Actual bills depend on each home's assessment.
Is Warren Township in Warren County?
No. Warren Township is in Somerset County. Warren County is a separate county in northwestern New Jersey. The township is named for General Joseph Warren, who was killed at the Battle of Bunker Hill.
Is there a train station in Warren Township?
No. The closest NJ Transit stations are Berkeley Heights, Gillette and Stirling, just outside the township, with service to New York Penn Station and Hoboken.
Are Warren homes on sewer or septic?
Both. The township runs a sewer system with three treatment plants and about 130 miles of sewer line, but many homes are not connected and use private septic systems. We confirm which one a home has before it goes on the market.
Which Interstate 78 exits serve Warren?
Exit 33 at County Route 525 on the Bernards line, Exit 36 at County Route 651 (King George Road) and Exit 40 at County Route 531. Interstate 78 runs about 6.7 miles across the northern part of the township.
Nearby towns
Towns that border Warren
Buying or selling in Warren?
Every ridge and valley sells differently
In Warren, sewer or septic is one of the first questions a buyer asks, along with which side of the Second Watchung Mountain a home is on. We answer those early, then go over your options together.
Call or text either of us directly.