
Washington
- County:
- Warren County
- County Seat:
- No
- Area (mi²):
- 1.965
- State:
- New Jersey
Washington is a borough located in Warren County, New Jersey. Washington has a 2025 population of 7,371. Washington is currently growing at a rate of 0.24% annually and its population has increased by 1.24% since the most recent census, which recorded a population of 7,281 in 2020.
The average household income in Washington is $94,516 with a poverty rate of 11.51%. The median age in Washington is 39.1 years: 35.2 years for males, and 40.9 years for females.