Identifiers: town · borough · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Dover (town), NJ | 18,460 |
| 2 | Hopatcong (borough), NJ | 14,362 |
| 3 | Oak Ridge (CDP), NJ | 10,996 |
| 4 | Succasunna (CDP), NJ | 10,338 |
| 5 | Hackettstown (town), NJ | 10,248 |
| 6 | Lake Hopatcong (CDP), NJ | 10,232 |
| 7 | Budd Lake (CDP), NJ | 9,784 |
| 8 | Lake Mohawk (CDP), NJ | 9,759 |
| 9 | Newton (town), NJ | 8,374 |
| 10 | Wharton (borough), NJ | 7,241 |
| 11 | Mount Arlington (borough), NJ | 5,909 |
| 12 | Franklin (borough), NJ | 4,912 |
| 13 | Ledgewood (CDP), NJ | 4,903 |
| 14 | Panther Valley (CDP), NJ | 4,391 |
| 15 | Landing (CDP), NJ | 4,296 |
| 16 | Stanhope (borough), NJ | 3,526 |
| 17 | Netcong (borough), NJ | 3,375 |
| 18 | Hamburg (borough), NJ | 3,266 |
| 19 | Mount Hope (CDP), NJ | 2,930 |
| 20 | Ogdensburg (borough), NJ | 2,258 |