Mason-Dixon Line map sells for $950,000 at Asheville auction

A hand-drawn map of the Mason-Dixon Line, one of the most historically significant documents in American history, sold for $950,000 at Brunk Auctions in Asheville, North Carolina on Thursday, October 29, 2026. The survey, originally commissioned in 1767–1768 by Charles Mason and Jeremiah Dixon to resolve a border dispute between the colonies of Maryland and Pennsylvania, later became synonymous with the division between free and slave states after its use in the 1820 Missouri Compromise. Forty-five bidders participated in the brief livestreamed and in-person auction, which lasted just under three minutes. The final price fell short of the auction house's high estimate of $1.2 million, though with the buyer's premium included, the total cost approached that figure.

The linen-backed document measures 76 inches long and 6.5 inches tall. It remained in the family of attorney Benjamin Chew, who represented the descendants of Pennsylvania founder William Penn, until 1982, when late publisher Malcolm S. Forbes purchased it for $360,000—then a record price for an American map at auction. The map was resold in 2002 for $556,000. Prior to the 2026 sale, auction house vice president Lauren Brunk contacted the Library of Congress to gauge interest; officials declined to bid due to budgetary constraints, though Brunk noted they would be pleased to receive the document if a donor were to purchase it on their behalf.

The anonymous buyer, whose identity the seller chose not to disclose at this time, acquired the map in a competitive bidding process that began at $400,000. A vertical section of the map showing the Delaware-Maryland border is housed separately at Princeton University.

The sale prompted broader discussion about American political divisions. Lauren Brunk observed that while the Mason-Dixon Line represented a significant historical division, contemporary divisions differ. Chris Cooper, a political scientist at Western Carolina University, noted that today's political and cultural identities have become increasingly aligned, making cross-party dialogue more difficult. He characterized the country as deeply divided while emphasizing that modern divisions operate differently from those that preceded the Civil War.