New Jersey county populations
21 supported county-equivalent records in New Jersey; July 1, 2025 population, 2024–2025 growth and 2025 land-area density.
Population totals use July 1, 2025 observations from PEP Vintage 2025. Change is measured since July 1, 2024. County equivalents are included, including Connecticut planning regions. Missing density is displayed as unavailable, never as zero.
Population table and filters
Whole-dataset downloads| Place | Population · 2025 | Change · 2024–25 | Growth · 2024–25 | People / sq. mi. |
|---|---|---|---|---|
| Bergen CountyNew Jersey · County equivalent · 34003 | 977,026 | +3,549 | +0.36% | 4,196.9 |
| Essex CountyNew Jersey · County equivalent · 34013 | 896,379 | +5,138 | +0.58% | 7,109.5 |
| Middlesex CountyNew Jersey · County equivalent · 34023 | 883,335 | +1,715 | +0.19% | 2,855.8 |
| Hudson CountyNew Jersey · County equivalent · 34017 | 735,033 | +4,005 | +0.55% | 15,912.4 |
| Ocean CountyNew Jersey · County equivalent · 34029 | 673,746 | +5,351 | +0.80% | 1,072.3 |
| Monmouth CountyNew Jersey · County equivalent · 34025 | 651,035 | +2,362 | +0.36% | 1,390.5 |
| Union CountyNew Jersey · County equivalent · 34039 | 601,863 | +3,120 | +0.52% | 5,856.6 |
| Camden CountyNew Jersey · County equivalent · 34007 | 535,799 | +2,204 | +0.41% | 2,420.4 |
| Passaic CountyNew Jersey · County equivalent · 34031 | 531,624 | +507 | +0.10% | 2,856.2 |
| Morris CountyNew Jersey · County equivalent · 34027 | 524,251 | +2,896 | +0.56% | 1,137.1 |
| Burlington CountyNew Jersey · County equivalent · 34005 | 481,439 | +3,917 | +0.82% | 602.3 |
| Mercer CountyNew Jersey · County equivalent · 34021 | 399,289 | +1,960 | +0.49% | 1,778.7 |
| Somerset CountyNew Jersey · County equivalent · 34035 | 356,486 | +1,364 | +0.38% | 1,180.9 |
| Gloucester CountyNew Jersey · County equivalent · 34015 | 312,638 | +1,375 | +0.44% | 970.9 |
| Atlantic CountyNew Jersey · County equivalent · 34001 | 278,657 | +190 | +0.07% | 501.6 |
| Cumberland CountyNew Jersey · County equivalent · 34011 | 157,148 | +741 | +0.47% | 325.1 |
| Sussex CountyNew Jersey · County equivalent · 34037 | 148,063 | +618 | +0.42% | 285.6 |
| Hunterdon CountyNew Jersey · County equivalent · 34019 | 131,781 | +684 | +0.52% | 308.0 |
| Warren CountyNew Jersey · County equivalent · 34041 | 112,953 | +529 | +0.47% | 316.8 |
| Cape May CountyNew Jersey · County equivalent · 34009 | 93,390 | -704 | -0.75% | 371.3 |
| Salem CountyNew Jersey · County equivalent · 34033 | 66,280 | +340 | +0.52% | 199.7 |
Use these comparisons consistently
A larger population does not necessarily mean faster growth. Absolute change measures the number of residents gained or lost; percentage change divides that difference by the starting population. The percentage column here covers one July-to-July interval, rather than a decade or a partial calendar year. Percent growth is suppressed where the starting population is zero.
Density divides the unrounded July 1, 2025 population by matching 2025 Gazetteer land area. It is measured in people per square mile and excludes water area. These geographic averages depend on the size and definition of each unit, so a county’s density is not directly comparable to a built-up city neighborhood.
County-equivalent names and units vary by state. Connecticut planning regions are represented in the current series; linking older county series requires a documented relationship. Incorporated places may cross county boundaries and do not form an exhaustive county breakdown.
Exports contain the current page’s visible rows after filtering, with reference date and release metadata. Use whole-dataset downloads for every row or select a compatible comparison to inspect a longer interval. The initial pep-2025-r1 snapshot remains reproducible when future releases are added.