Rochester is a city founded in 1854 in the U.S. State of Minnesota and is the county seat of Olmsted County located on the Zumbro River south fork in Southeast Minnesota. The area initially developed as a stagecoach stop between Saint Paul, Minnesota and Dubuque, Iowa. When the Winona and St Peter Railroad initiated service in October 1864, it brought new residents and business opportunities for further growth and expansion. In 1863, Dr. William W. Mayo arrived as the examining surgeon for Union draftees in the Civil War. He started a world famous business the Mayo Clinic. The community was named after Rochester, New York by immigrants from that area. Dr. William W. Mayo started the world famous Mayo clinic in Rochester.