Leonard Harsh (March 22, 1801 – 1866) was an American politician from Ohio.
He moved to Carroll County, Ohio, at a young age.
He later represented the Carroll County district in the Ohio House from 1862 to 1864.
They had four children, Samuel, Levi, Sarah Anne and Jacob W. His wife died in 1830.
[2][4] His daughter Almira married Albert R. Haines, Ohio senator.