Founded in 1832, Roundhead is the oldest white community in Hardin County. During its history, it has also been referred to as "Round Head," "Round Heads," "Round Headstown," and "Roundheads Town."
Roundhead is named for the great Wyandot chief Roundhead. The Wyandots, led by Chief Roundhead, had a prominent village on the banks of the Scioto in the location of present-day Roundhead. Chief Roundhead was an important ally of Tecumseh, and as Tecumseh's "enforcer" was helpful in "persuading" various Indian tribes to unite under Tecumseh and fight against aggression by the white man. Chief Roundhead signed the Treaty of Greenville as leader of the Wyandots.