Lewisburg is a village in Preble County, Ohio, United States, founded in 1818. The current village incorporates two prior villages, the original Lewisburg and Euphemia, which merged in 1916. The population was 1,798 at the 2000 census. It is part of the Dayton Metropolitan Statistical Area.
Lewisburg was founded soon after Harrison Township was organized in 1816. Although one Zachariah Hole (founder of Miamisburg, Ohio) began the effort, the oldest remaining documentary evidence is that of a record filed by Henry Horn in the county recorder's office in Eaton on September 7, 1818:
Know ye, that I , Henry Horn, of Preble County, in the State of Ohio, having laid out a town in the county and State aforesaid, on sections number twenty-seven and twenty-eight, in range three (East), on the southeast and southwest quarters of said sections which the town contains, twenty-eight in-lots, with one street running north, five degrees east, namely: Greenville street; with three streets running parallel with each other and crossing Greenville street at right angeles, namely: Dayton street, Twin street, and Water street. Greenville street and Dayton street are each four rods wide; Water street and Twin street are each two rods wide. There are two alleys crossing Greenville street at right angles, running parallel with Dayton street, and one alley crossing Dayton street at right angles and running parallel with Greenville street, with alleys extending around the town. The alleys are each eight (8) and one-fourth feet wide. The town shall be called Lewisburgh.