
Washington township
- County:
- Warren County
- County Seat:
- No
- Area (mi²):
- 101.661
- State:
- New Jersey
Washington township is located in Warren County, New Jersey. Washington township has a 2025 population of 719. Washington township is currently growing at a rate of 1.13% annually and its population has increased by 4.2% since the most recent census, which recorded a population of 690 in 2020.
The average household income in Washington township is $109,605 with a poverty rate of 4.67%. The median age in Washington township is 56.9 years: 57.8 years for males, and 53.5 years for females.