Ranking of New Jersey Counties By Population in 2021
Updated on June 18, 2025.
Based on the US Census Vintage data estimates, in 2021, the Population for New Jersey was 9.27M. Among all New Jersey counties, Bergen County had the highest population (955.51K), followed by Middlesex County (862.51K), and Essex County (854.42K).
The chart below shows the top 10 counties, and the table below shows the ranking of all New Jersey counties.
You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.
Related Topics: New Jersey Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage), 2021 Census.
See this for other years:
Ranking of New Jersey Counties By Population in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Bergen County | 955510 |
| 2 | Middlesex County | 862513 |
| 3 | Essex County | 854416 |
| 4 | Hudson County | 703545 |
| 5 | Ocean County | 649990 |
| 6 | Monmouth County | 646531 |
| 7 | Union County | 572930 |
| 8 | Camden County | 524176 |
| 9 | Passaic County | 518494 |
| 10 | Morris County | 510691 |
| 11 | Burlington County | 464547 |
| 12 | Mercer County | 382231 |
| 13 | Somerset County | 346562 |
| 14 | Gloucester County | 304636 |
| 15 | Atlantic County | 274991 |
| 16 | Cumberland County | 152100 |
| 17 | Sussex County | 145741 |
| 18 | Hunterdon County | 129691 |
| 19 | Warren County | 110464 |
| 20 | Cape May County | 95720 |
| 21 | Salem County | 65062 |