Armstrong township
- County:
- Lycoming County
- County Seat:
- No
- Area (mi²):
- 24.744
- State:
- Pennsylvania
Armstrong township is located in Lycoming County, Pennsylvania. Armstrong township has a 2026 population of 672. Armstrong township is currently declining at a rate of -0.44% annually and its population has decreased by -1.75% since the most recent census, which recorded a population of 684 in 2020.
The median household income in Armstrong township is $78,929 with a poverty rate of 10.6%. The median age in Armstrong township is 48.3 years: 48.9 years for males, and 45.5 years for females. For every 100 females there are 94.2 males.