
Lopatcong township
- County:
- Warren County
- County Seat:
- No
- Area (mi²):
- 7.316
- State:
- New Jersey
Lopatcong township is located in Warren County, New Jersey. Lopatcong township has a 2025 population of 9,503. Lopatcong township is currently growing at a rate of 0.38% annually and its population has increased by 8.14% since the most recent census, which recorded a population of 8,788 in 2020.
The average household income in Lopatcong township is $105,733 with a poverty rate of 10.41%. The median age in Lopatcong township is 46.4 years: 41.5 years for males, and 49.7 years for females.