Martinsburg
- County:
- Knox County
- County Seat:
- No
- Area (mi²):
- 0.177
- State:
- Ohio
Martinsburg is a village located in Knox County, Ohio. Martinsburg has a 2026 population of 223. Martinsburg is currently declining at a rate of 0% annually and its population has decreased by -0.45% since the most recent census, which recorded a population of 224 in 2020.
The median household income in Martinsburg is $55,313 with a poverty rate of 1.65%. The median age in Martinsburg is 44 years: 38.5 years for males, and 44.4 years for females. For every 100 females there are 91.8 males.