Waynesfield is a village in Auglaize County, Ohio, United States. The population was 847 at the 2010 census. It is included in the Wapakoneta, Ohio Micropolitan Statistical Area.
Waynesfield was founded on July 1, 1848.
Waynesfield is located at 40°36′7″N 83°58′30″W (40.601858, -83.974884).
According to the United States Census Bureau, the village has a total area of 0.74 square miles (1.92 km2), all land.
As of the census of 2010, there were 847 people, 309 households, and 218 families living in the village. The population density was 1,144.6 inhabitants per square mile (441.9/km2). There were 350 housing units at an average density of 473.0 per square mile (182.6/km2). The racial makeup of the village was 97.8% White, 0.6% African American, 0.2% Native American, 0.1% Asian, 0.7% from other races, and 0.6% from two or more races. Hispanic or Latino of any race were 2.1% of the population.
There were 309 households of which 42.1% had children under the age of 18 living with them, 50.8% were married couples living together, 12.3% had a female householder with no husband present, 7.4% had a male householder with no wife present, and 29.4% were non-families. 25.6% of all households were made up of individuals and 8.4% had someone living alone who was 65 years of age or older.