
Spencerville
- County:
- Allen County
- County Seat:
- No
- Area (mi²):
- 0.965
- State:
- Ohio
Spencerville is a village located in Allen County, Ohio. Spencerville has a 2025 population of 2,138. Spencerville is currently declining at a rate of -0.6% annually and its population has decreased by -2.91% since the most recent census, which recorded a population of 2,202 in 2020.
The average household income in Spencerville is $54,299 with a poverty rate of 17.44%. The median age in Spencerville is 35.3 years: 31 years for males, and 39.2 years for females.