The Blackford County Courthouse is a historic building located in Hartford City, Indiana, the county seat of Blackford County. The building stands on a public square in the city's downtown commercial district. Built during the Indiana Gas Boom, most of the construction work was completed in 1894. The current courthouse was preceded by an other courthouse building on the same site, which was declared inadequate by a judge in 1893, and was torn down. Following the condemnation of the original courthouse, the county’s judicial activities were temporarily located in a building across the street.