New Jersey Population By County in 2021

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2021, the population of New Jersey was 9,270,541. Among all New Jersey counties, Bergen had the highest population (955,510), followed by Middlesex (862,513), and Essex (854,416).

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).

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New Jersey Population By County in 2021

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County	Population	% of State Population
Atlantic	274991	2.97
Bergen	955510	10.31
Burlington	464547	5.01
Camden	524176	5.65
Cape May	95720	1.03
Cumberland	152100	1.64
Essex	854416	9.22
Gloucester	304636	3.29
Hudson	703545	7.59
Hunterdon	129691	1.40
Mercer	382231	4.12
Middlesex	862513	9.30
Monmouth	646531	6.97
Morris	510691	5.51
Ocean	649990	7.01
Passaic	518494	5.59
Salem	65062	0.70
Somerset	346562	3.74
Sussex	145741	1.57
Union	572930	6.18
Warren	110464	1.19