The Marion County Courthouse is a Beaux-Arts style building in Fairmont, West Virginia, in the United States. The courthouse was constructed from 1897 to 1900, and was designed by the architectural firm of Yost & Packard of Columbus, Ohio. Its dome is topped by a figure carrying the scales of justice.

The courthouse, located at the intersection of Adams and Jefferson Streets in downtown Fairmont, and the adjacent American Foursquare-style sheriff's residence, were jointly added to the National Register of Historic Places in 1979 for their architectural, artistic and governmental significance.

Popular culture Scenes in the film The Bad Guarduan were filmed in the Marion County Courthouse.

See also List of Registered Historic Places in West Virginia

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