Warren County, New Jersey

Time zones in Warren County

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

1. 0784032,105 people
2. 0886531,427 people
3. 0786026,047 people
4. 0788215,115 people
5. 078219,662 people
6. 078259,210 people
7. 078748,752 people
8. 078237,451 people
9. 088866,435 people
10. 088024,552 people
11. 088274,346 people
12. 078633,819 people

22 ZIP Code areas overlap Warren County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Townships in Warren County, largest first

1. Lopatcong Township9,321 people
2. Mansfield Township7,778 people
3. Washington Township6,691 people
4. Blairstown Township5,741 people
5. Independence Township5,536 people
6. Greenwich Township5,512 people
7. Allamuchy Township5,427 people
8. White Township4,679 people
9. Pohatcong Township3,266 people
10. Franklin Township2,992 people
11. Knowlton Township2,919 people
12. Liberty Township2,680 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in New Jersey, by county

School districts in Warren County, largest first

1. Warren Hills Regional School District24,795 people
2. Phillipsburg Town School District15,299 people
3. North Warren Regional School District12,220 people
4. Hackettstown Town School District10,140 people
5. Lopatcong Township School District9,321 people
6. Great Meadows Regional School District8,216 people
7. Mansfield Township School District (Warren County)7,778 people
8. Washington Borough School District7,334 people
9. Blairstown Township School District7,164 people
10. Washington Township School District (Warren County)6,691 people
11. Greenwich Township School District (Warren County)5,512 people
12. Allamuchy Township School District5,427 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

1. Phillipsburg, New Jersey (town)15,299 people
2. Hackettstown, New Jersey (town)10,140 people
3. Washington, New Jersey (borough)7,334 people
4. Beattystown, New Jersey (CDP)4,917 people
5. Panther Valley, New Jersey (CDP)4,553 people
6. Greenwich, Warren County, New Jersey (CDP)2,679 people
7. Belvidere, New Jersey (town)2,538 people
8. Alpha, New Jersey (borough)2,436 people
9. Brass Castle, New Jersey (CDP)1,936 people
10. Upper Pohatcong, New Jersey (CDP)1,876 people
11. Oxford, New Jersey (CDP)1,122 people
12. Vienna, New Jersey (CDP)999 people

See all 41 cities, towns and communities in Warren County, largest first

Bordering areas, nearest first

Distances are straight lines between map points.

1. Northampton County, Pennsylvania17 mi southwest
2. Hunterdon County, New Jersey21 mi south
3. Monroe County, Pennsylvania22 mi northwest
4. Morris County, New Jersey24 mi east
5. Sussex County, New Jersey26 mi northeast
6. Bucks County, Pennsylvania36 mi south

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See this county on Census.gov ↗