Establshed in 1800 as part of the Virginia Mlitary District, Clermont is the states eighth oldest county and is the furthest county west in Appalachin territory of Ohio. It is also the eleventh oldest county of the former Northwest Territory. The county is named after the Clermont Province located in France with the county seat being Batavia. With a total area of 460 sqaure miles, there are 206,428 residents calling the county home.