New Jersey Population By County in 2020
Updated on June 16, 2025.
Based on the US Census Vintage data estimates, in 2020, the population of New Jersey was 9,272,794. Among all New Jersey counties, Bergen had the highest population (953,711), followed by Middlesex (861,460), and Essex (860,020). Salem was the least populated county (64,843).
Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.
You can see similar information for other states and by state for the United States.
Related Topics: New Jersey Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
New Jersey Population By County in 2020
New Jersey Population By County in 2020
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| County | Population | % of State Population |
|---|---|---|
| Atlantic | 274196 | 2.96 |
| Bergen | 953711 | 10.29 |
| Burlington | 461694 | 4.98 |
| Camden | 523151 | 5.64 |
| Cape May | 95051 | 1.02 |
| Cumberland | 153724 | 1.66 |
| Essex | 860020 | 9.28 |
| Gloucester | 302575 | 3.26 |
| Hudson | 721909 | 7.79 |
| Hunterdon | 128793 | 1.39 |
| Mercer | 386492 | 4.17 |
| Middlesex | 861460 | 9.29 |
| Monmouth | 642778 | 6.93 |
| Morris | 508472 | 5.48 |
| Ocean | 638554 | 6.89 |
| Passaic | 523464 | 5.65 |
| Salem | 64843 | 0.70 |
| Somerset | 344788 | 3.72 |
| Sussex | 143919 | 1.55 |
| Union | 573680 | 6.19 |
| Warren | 109520 | 1.18 |