
Washington township
- County:
- Warren County
- County Seat:
- No
- Area (mi²):
- 17.961
- State:
- New Jersey
Washington township is located in Warren County, New Jersey. Washington township has a 2025 population of 6,938. Washington township is currently growing at a rate of 1.15% annually and its population has increased by 6.84% since the most recent census, which recorded a population of 6,494 in 2020.
The average household income in Washington township is $149,082 with a poverty rate of 5.25%. The median age in Washington township is 45.9 years: 43.8 years for males, and 49.3 years for females.