Warren County, New Jersey
Check your Warren County registration.
Confirm what New Jersey has on file first, then use Warren County's official election channels below.
Stop 1: County
About Warren County
Warren County is a county located in the northwestern part of the U.S. state of New Jersey. According to the 2020 census, the county was the state's 19th-most populous county, with a population of 109,632, its highest decennial count ever and an increase of 940 (+0.9%) from the 2010 census count of 108,692, which in turn reflected an increase of 6,255 (+6.1%) from 102,437 counted at the 2000 census. The United States Census Bureau's Population Estimates Program estimated a 2025 population of 112,953, an increase of 3,321 (+3.0%) from the 2020 decennial census. The county is part of the North Jersey region of the state.
Description adapted from Wikipedia, CC BY-SA 4.0.
Stop 2: Facts
Warren County at a glance
- County seat
- Belvidere
- Population
- 109,632 (2020)
- Land area
- 363 sq mi
- Founded
- 1824
Stop 3: Places
Largest communities in Warren County
- Phillipsburg15,249
- Hackettstown10,248
- Lopatcong Township8,776
- Mansfield Township7,781
- Washington7,299
Stop 4: History
History of Warren County
The county borders the Delaware River and Easton, Pennsylvania in the Lehigh Valley to its west, the New York City metropolitan area to its east, the Poconos to its northwest, and Hunterdon County to its south. Warren County constitutes part of the Allentown-Bethlehem-Easton, PA-NJ metropolitan statistical area in the Lehigh Valley and is the only New Jersey county not a part of the combined statistical areas of either New York City or Philadelphia. The county's most populous municipality is Phillipsburg, with 15,249 residents at the time of the 2020 census while Hardwick Township had both the largest area, 37.92 square miles (98.2 km2), and the fewest people with 1,696 residents. Its county seat is Belvidere. Warren County was incorporated by an act of the New Jersey Legislature on November 20, 1824, from portions of Sussex County.
Adapted from Wikipedia, CC BY-SA 4.0.
Stop 5: Check
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Stop 6: Resources
Official channels
Warren County election resources
Statewide tools and every New Jersey resource in one place: the New Jersey page at Scan Check Protect →
Stop 7: Neighbors
Neighboring counties
Stop 8: About
Part of New Jersey Voter Check
This is the Warren County page of New Jersey Voter Check, a project of True the Vote, pointing New Jersey voters at the official tools that already exist — and at Scan Check Protect to verify your registration.
Where anything here differs from what Warren County or the New Jersey Division of Elections publishes, they are right and this page is not.