Rock Port, Missouri, A Border Dispute Made a County Seat

Rock Port became the seat of Atchison County, Missouri because the United States Supreme Court moved a state line. In eighteen forty-nine the Court settled a border dispute between Missouri and Iowa, shifting Missouri's northern boundary about nine and a half miles south. The ruling put Linden, the original county seat, on the Iowa side of the new line. Atchison County suddenly had a courthouse in another state.

Nathan Meek laid out Rock Port on April eighth, eighteen fifty-one, and it was incorporated in December eighteen fifty-five. The county seat moved here in eighteen fifty-six. The town sits eight miles east of the Missouri River on the Loess Hills bluffs above Rock Creek, which gave it its name. Today Rock Port is a small city of roughly twelve hundred people, the government center for one of Missouri's northwestern-most counties, a role it owes entirely to a Supreme Court ruling that erased the town its predecessor was built in.