
Sparta township
- County:
- Sussex County
- County Seat:
- No
- Area (mi²):
- 36.745
- State:
- New Jersey
Sparta township is located in Sussex County, New Jersey. Sparta township has a 2025 population of 20,409. Sparta township is currently growing at a rate of 0.53% annually and its population has increased by 4.01% since the most recent census, which recorded a population of 19,623 in 2020.
The average household income in Sparta township is $205,915 with a poverty rate of 3.1%. The median age in Sparta township is 42.2 years: 42.2 years for males, and 42.1 years for females.