Jefferson township
- County:
- Jay County
- County Seat:
- No
- Area (mi²):
- 35.13
- State:
- Indiana
Jefferson township is located in Jay County, Indiana. Jefferson township has a 2026 population of 684. Jefferson township is currently growing at a rate of 0.44% annually but its population has decreased by -1.87% since the most recent census, which recorded a population of 697 in 2020.
The median household income in Jefferson township is $78,500 with a poverty rate of 4.23%. The median age in Jefferson township is 32.9 years: 32.4 years for males, and 37.2 years for females. For every 100 females there are 126.8 males.