Mendon is a village in Mercer County, Ohio, United States.

Mendon was originally called Guilford, and under the latter name was platted in 1834.

[7] As of the census[9] of 2010, there were 662 people, 255 households, and 182 families living in the village.

There were 288 housing units at an average density of 514.3 per square mile (198.6/km2).

22.7% of all households were made up of individuals, and 10.2% had someone living alone who was 65 years of age or older.

There were 278 housing units at an average density of 732.8 per square mile (282.9/km2).

22.5% of all households were made up of individuals, and 10.3% had someone living alone who was 65 years of age or older.