Greenwich Township · Warren County

Greenwich Township

Stewartsville & Upper Stewartsville

Explore Greenwich Township, Stewartsville and Upper Stewartsville in Warren County with local business, dining, history, parks, real estate and visitor resources.

StewartsvilleUpper StewartsvilleMorris CanalPort Warren ParkKennedy House & MillRoute 57Warren County

Kennedy House and Mill in Greenwich Township, Warren County — Kennedy House & Mill · photo by Jerrye & Roy Klotz, CC BY-SA 3.0 / Wikimedia Commons

Coverage: NJTGO treats Stewartsville and Upper Stewartsville as communities within Greenwich Township. The 08886 postal address also reaches properties in neighboring municipalities, so municipal geography—not postal city—controls inclusion.

5,4732020 U.S. Census population

08886Stewartsville ZIP Code

1738Appears in early township records

1798Incorporated under NJ township law

Port WarrenMorris Canal heritage

Explore Greenwich Township

Business & ShoppingLocal services, Route 57/173 businesses, antiques, consignments and shopping.Food & DrinkTownship-focused dining with GF / DF / Vegan filters where evidence supports them.Real EstateVillage homes, neighborhoods, acreage, zoning, utilities and limestone geology.Visiting & LodgingPort Warren Park, Morris Canal history, Kennedy House & Mill and regional lodging.JobsCurrent public, college and regional employment resources.ClassifiedsA useful local marketplace landing page without empty category scaffolding.

Township Character

Greenwich is one of Warren County's oldest townships, with Stewartsville at its historic core and modern residential neighborhoods extending toward Route 57, Route 173, County Route 519 and Interstate 78. The community combines historic transportation corridors, preserved land, local commerce and quick access to Phillipsburg and Easton.

Stewartsville VillageHistoric streets, houses, churches and transportation history.

The village developed where important road, canal and rail routes converged.

Upper StewartsvilleRecognized residential community within Greenwich Township.

Postal identity should never be used by itself to determine municipality.

Port Warren Park477 Uniontown Road · Stewartsville

County park and Morris Canal Greenway access at Inclined Plane 9 West.

Kennedy House & Mill306 NJ Route 173 · Stewartsville

National Register historic property reflecting early milling, industry and government history.

Community Institutions

Churches, cemeteries and community institutions belong here rather than in Business & Shopping.

Old Greenwich Presbyterian Church17 Greenwich Church Road · Stewartsville · 908-479-4449

Historic congregation opposite the Kennedy House & Mill area.

Greenwich Cemetery15 Greenwich Church Road · Stewartsville

Historic cemetery associated with early township families.

Stewartsville Presbyterian Church550 North Main Street · Stewartsville · 908-859-1399

Longstanding Stewartsville congregation.

Warren County Library — Southwest Branch404 County Road 519 · Phillipsburg mailing address · 908-818-1280

County library branch physically serving the Greenwich/Stewartsville area; postal city differs from municipality.

Current October 2026 Community Dates

Fall Townwide Yard SaleSaturday, October 10 · 8:00 a.m.–4:00 p.m.

Township permit/registration rules apply.

Fall Bulk Clean UpOctober 16–17 · 8:00 a.m.–4:00 p.m.

Permit required for the municipal cleanup program.

Document ShreddingSaturday, October 24

Township calendar lists a shredding event along with recycling/drop-off activity.

Trick or TreatSaturday, October 31 · 5:00–7:00 p.m.

Current township calendar time.

Explore More of Greenwich Township

Use the town navigation above to move between local businesses, dining, real estate, visiting, classifieds and jobs.