1850 Counties of New Jersey
| in area | Courts held at | Pop in 1850 | ||
| Atlantic Co, NJ | southeast part on Atlantic Ocean, water by Great & Little Egg-Harbor rivers | 550 sq miles | May's Landing | 8,962 |
| Burlington Co, NJ | southern part, between Delaware river & Atlantic ocean | 500 sq miles | Mount Holly | 43, 203 |
| Camden Co, NJ | western boundary, northeast side of Delaware river | blank | Camden | 25,422 |
| Cape May Co, NJ | extreme southeast part, Tuckahoe river on north, Delaware bay on west & Atlantic ocean on east | 252 | Cape May Court House | 6,433 |