New Madison is a village in Darke County, Ohio, United States.

New Madison was platted by Zadock Smith in 1817 for purposes of land speculation, but his efforts failed; he was unable to sell any of the lots.

Two years later, he sold the land to Ernestus Putnam, who replatted the village and began to sell lots in 1831; unlike Smith, Putnam saw the establishment of a successful community.

[4]: 562 According to the United States Census Bureau, the village has a total area of 0.41 square miles (1.06 km2), all land.

23.9% of all households were made up of individuals, and 11.9% had someone living alone who was 65 years of age or older.

The racial makeup of the village was 97.43% White, 0.12% African American, 0.61% Asian, and 1.84% from two or more races.

25.6% of all households were made up of individuals, and 11.9% had someone living alone who was 65 years of age or older.