What are the fastest-growing counties in New Jersey?
Ocean County is the fastest-growing county in New Jersey: its population grew 1.09% a year from 2020 to 2025, to 673,746 residents (Census PEP Vintage 2025). Union County (0.97%) and Burlington County (0.84%) follow. New Jersey as a whole grew 0.59% a year to 9,548,215 residents.
Data as of 2026-09-23. Population, growth and migration: PEP Vintage 2025 · 2020–2025. Income migration: IRS SOI 2022–2023 (2-yr lag).
Top 10 counties in New Jersey by population growth, 2020 to 2025
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Ocean County | 673,746 | 1.09% | +16,721 | +6,837 | +$171.5M |
| 2 | Union County | 601,863 | 0.97% | -27,452 | +42,596 | -$63.9M |
| 3 | Burlington County | 481,439 | 0.84% | +9,817 | +8,869 | +$10.3M |
| 4 | Essex County | 896,379 | 0.83% | -45,986 | +64,457 | -$252.1M |
| 5 | Somerset County | 356,486 | 0.69% | -2,882 | +11,628 | -$224.4M |
| 6 | Gloucester County | 312,638 | 0.66% | +8,238 | +2,069 | +$19.8M |
| 7 | Mercer County | 399,289 | 0.66% | -13,563 | +22,314 | -$250.2M |
| 8 | Warren County | 112,953 | 0.64% | +2,561 | +1,578 | +$9.1M |
| 9 | Morris County | 524,251 | 0.62% | -1,971 | +13,737 | -$136.1M |
| 10 | Sussex County | 148,063 | 0.58% | +3,321 | +878 | +$19.4M |
Where are people moving in New Jersey?
Ocean County gained the most people from elsewhere in the United States: net domestic migration of +16,721 from 2020 to 2025 (Census PEP Vintage 2025). The table ranks every New Jersey place with 10,000 or more residents by that figure; the IRS column shows net adjusted gross income migration for 2022 to 2023.
| Rank | County | Population | Growth (% per year) | Net domestic migration | Net international migration | IRS net AGI migration |
|---|---|---|---|---|---|---|
| 1 | Ocean County | 673,746 | 1.09% | +16,721 | +6,837 | +$171.5M |
| 2 | Burlington County | 481,439 | 0.84% | +9,817 | +8,869 | +$10.3M |
| 3 | Gloucester County | 312,638 | 0.66% | +8,238 | +2,069 | +$19.8M |
| 4 | Sussex County | 148,063 | 0.58% | +3,321 | +878 | +$19.4M |
| 5 | Warren County | 112,953 | 0.64% | +2,561 | +1,578 | +$9.1M |
| 6 | Salem County | 66,280 | 0.46% | +1,654 | +503 | -$1.0M |
| 7 | Hunterdon County | 131,781 | 0.46% | +1,513 | +1,430 | -$50.3M |
| 8 | Cape May County | 93,390 | -0.35% | +1,387 | +372 | +$27.5M |
| 9 | Atlantic County | 278,657 | 0.32% | -23 | +6,289 | -$12.2M |
| 10 | Cumberland County | 157,148 | 0.44% | -1,068 | +4,319 | -$19.3M |
Go past the headline numbers
The interactive Demographics map layer and the full report for a single place are part of paid plans.
Get the Demographics Report for Ocean CountyFrequently asked questions
- What are the fastest-growing counties in New Jersey?
- By population growth from 2020 to 2025, the fastest are Ocean County (1.09% a year), Union County (0.97% a year), Burlington County (0.84% a year), Essex County (0.83% a year) and Somerset County (0.69% a year) (Census PEP Vintage 2025). Only places with 10,000 or more residents are ranked.
- Where are people moving in New Jersey?
- By net domestic migration from 2020 to 2025, the largest gains are Ocean County (+16,721), Burlington County (+9,817) and Gloucester County (+8,238) (Census PEP Vintage 2025).
- How fast is New Jersey growing overall?
- New Jersey grew 0.59% a year from 2020 to 2025, to 9,548,215 residents, with net migration of +167,794 people (Census PEP Vintage 2025).
- Where does this New Jersey data come from, and how current is it?
- Population, growth and migration come from the U.S. Census Bureau Population Estimates Program (PEP Vintage 2025 · 2020–2025). Income migration comes from IRS Statistics of Income (IRS SOI 2022–2023 (2-yr lag)). Counties with fewer than 10,000 residents are not ranked. Data last loaded 2026-09-23.
Data as of 2026-09-23: sources and periods
- Population, growth and migration
- U.S. Census Bureau, Population Estimates Program: PEP Vintage 2025 · 2020–2025. census.gov/programs-surveys/popest
- Income migration (net AGI)
- Internal Revenue Service, Statistics of Income migration data: IRS SOI 2022–2023 (2-yr lag). irs.gov/statistics/soi-tax-stats-migration-data
How to read the table
- Population is the Census July 1 estimate of the latest vintage.
- Growth is the compound annual rate over 2020 to 2025.
- Net domestic and international migration are cumulative people over 2020 to 2025.
- IRS net AGI migration is adjusted gross income that moved in, less what moved out, for 2022 to 2023. A plus sign means a net inflow.
- Places with fewer than 10,000 residents are left out of the rankings.