Spencerville is a village in Allen County, Ohio, United States.

Spencerville was platted in 1844 when the Miami and Erie Canal was extended to that point.

[6] A post office called Acadia was established in 1854, and the name was changed to Spencerville in 1867.

[7] According to the United States Census Bureau, the village has a total area of 0.97 square miles (2.51 km2), all land.

24.6% of all households were made up of individuals, and 12.2% had someone living alone who was 65 years of age or older.

25.4% of all households were made up of individuals, and 13.0% had someone living alone who was 65 years of age or older.

Spencerville High School sports participate in the Northwest Conference, an athletic body sanctioned by the Ohio High School Athletic Association.