All 21 Counties of New Jersey: Complete List

New Jersey packs 21 counties into the nation's most densely populated state. From the Delaware River to the Atlantic, each has distinct character—urban, suburban, rural, shore, or mountain.

The 21 Counties (Alphabetical)

1. Atlantic County
2. Bergen County
3. Burlington County
4. Camden County
5. Cape May County
6. Cumberland County
7. Essex County
8. Gloucester County
9. Hudson County
10. Hunterdon County
11. Mercer County
12. Middlesex County
13. Monmouth County
14. Morris County
15. Ocean County
16. Passaic County
17. Salem County
18. Somerset County
19. Sussex County
20. Union County
21. Warren County

Quick Regional Grouping

Gateway/NYC Metro: Bergen, Hudson, Essex, Union, Passaic. Central/Shore: Middlesex, Monmouth, Ocean, Mercer. South/Philly Metro: Camden, Gloucester, Burlington, Salem, Atlantic, Cape May, Cumberland. Northwest/Highlands: Sussex, Warren, Morris, Hunterdon, Somerset.

Notable Extremes

• Most populous: Bergen (~955,000)
• Least populous: Salem (~65,000)
• Largest by area: Burlington (819 sq mi)
• Smallest by area: Hudson (47 sq mi)
• Highest income: Hunterdon, Somerset, Morris (consistently top 20 nationally)