Counties · New Jersey

Counties of New Jersey

New Jersey has 21 counties. Bergen County is the largest with 977,026 residents in 2025. 20 of the 21 gained residents between 2020 and 2025 by the Census Bureau's estimates.

What counties are in New Jersey?

Sorted by the 2025 population estimate; sort by any column.

Counties of New Jersey: 2025 estimate, change since 2020, ACS 2020-2024 5-year estimates

Bergen County	977,026	+2.2%	71	203	$124,884	$623,000
Essex County	896,379	+3.9%	32	211	$80,789	$524,100
Middlesex County	883,335	+2.3%	61	192	$111,549	$462,900
Hudson County	735,033	+1.4%	12	183	$91,795	$539,700
Ocean County	673,746	+5.7%	60	145	$89,863	$398,400
Monmouth County	651,035	+1.2%	75	155	$124,845	$606,100
Union County	601,863	+4.6%	27	120	$103,202	$529,200
Camden County	535,799	+2.3%	52	129	$88,755	$287,100
Passaic County	531,624	+1.2%	28	120	$87,522	$459,500
Morris County	524,251	+2.9%	70	110	$137,326	$582,500
Burlington County	481,439	+4.2%	58	117	$108,111	$354,000
Mercer County	399,289	+3.1%	25	84	$100,645	$377,700
Somerset County	356,486	+3.2%	59	74	$140,374	$552,100
Gloucester County	312,638	+3.4%	41	69	$105,115	$310,400
Atlantic County	278,657	+1.5%	45	74	$78,050	$295,000
Cumberland County	157,148	+1.9%	50	42	$67,436	$221,400
Sussex County	148,063	+2.7%	33	42	$116,186	$369,400
Hunterdon County	131,781	+2.2%	33	30	$141,715	$517,200
Warren County	112,953	+3.0%	58	23	$100,869	$346,500
Cape May County	93,390	−2.0%	37	33	$91,128	$434,600
Salem County	66,280	+2.2%	23	25	$79,960	$239,500

Source: PEP Vintage 2025 (CO-EST2025); American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Census population estimates

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections