The Belmont County Courthouse is located at 101 West Main Street in St. Clairsville, Ohio, United States.

This courthouse was a simple two-story brick building, and was only used for a few years until the county seat was removed to the more central St. Clairsville.

The new courthouse stood two stories high and had long rectangular windows lining the facade.

A pair of arched windows are flanked by a set of Corinthian pilasters supporting a pediment and a frieze bearing the year "1886" in the center with a fanlight above.

The central projection is topped with a pediment with a circle light framed by a carved wreath of flags.

The rest of the facade on either side of the central projection is symmetrical, with three arched windows on each floor and out-thrust corners.

A steel bell weighing 3,800 pounds once hung from the tower but was taken down during restoration and now rests in front of the courthouse.

The southern portion of the lot consists of a series of stairs with the main landing the site of the local farmers' market in the summer and the public Christmas tree in the winter.

The courtrooms and county offices have been refitted with modern conveniences, like an elevator, central air and heating, as well as weather-proof windows.