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Lamar County, the county nearest Georgia's geographical center, dates to 1920 when the state legislature partitioned lands from Pike and Monroe counties. The new county was named for Lucius Quintus Cincinnatus Lamar, a Confederate colonel, member of Congress and U.S. secretary of the interior. President Grover Cleveland later honored Lamar by nominating him to the Supreme Court. The county seat, Barnesville, derives its name from Gideon Barnes who established a tavern and stagecoach stop there in 1820.
