Lost River township
- County:
- Martin County
- County Seat:
- No
- Area (mi²):
- 42.293
- State:
- Indiana
Lost River township is located in Martin County, Indiana. Lost River township has a 2026 population of 497. Lost River township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 497 in 2020.
The median household income in Lost River township is $76,058 with a poverty rate of 5.54%. The median age in Lost River township is 53.2 years: 54 years for males, and 43.5 years for females. For every 100 females there are 142.9 males.