What are the largest counties in New Jersey?

Bergen County is the largest county in New Jersey, with 977,026 residents in 2025 (Census PEP). Essex County (896,379) and Middlesex County (883,335) come next.

Data as of 2025 · updated November 5, 2026

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All 21 ranked New Jersey counties

New Jersey counties ranked by population
Rank	County	Residents 2025	Change 2020–25
1	Bergen County	977,026	+2.4%
2	Essex County	896,379	+4.2%
3	Middlesex County	883,335	+2.6%
4	Hudson County	735,033	+1.8%
5	Ocean County	673,746	+5.6%
6	Monmouth County	651,035	+1.3%
7	Union County	601,863	+4.9%
8	Camden County	535,799	+2.4%
9	Passaic County	531,624	+1.6%
10	Morris County	524,251	+3.2%
11	Burlington County	481,439	+4.3%
12	Mercer County	399,289	+3.3%
13	Somerset County	356,486	+3.5%
14	Gloucester County	312,638	+3.3%
15	Atlantic County	278,657	+1.6%
16	Cumberland County	157,148	+2.2%
17	Sussex County	148,063	+2.9%
18	Hunterdon County	131,781	+2.3%
19	Warren County	112,953	+3.2%
20	Cape May County	93,390	−1.7%
21	Salem County	66,280	+2.3%

How this is ranked

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built.

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Questions

What is the largest county in New Jersey?

Bergen County is the largest county in New Jersey, with 977,026 residents in 2025 (Census PEP). Essex County (896,379) and Middlesex County (883,335) come next.

How is this ranking calculated?

More rankings for New Jersey

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