The Florida Legislature formed Lafayette County on this date. It was created from part of Madison County and named after the Marquis de Lafayette, the French general who assisted the Continental Army during the American Revolutionary War. The Suwannee River forms its eastern boundary and the county seat and only incorporated city is Mayo. It remains one of the least populous counties in the state with less than 10,000 residents. The first suspension bridge erected in Florida, the Hal W. Adams Bridge, named after a local county and circuit judge, spans the Suwannee River in Lafayette County.