what county is rochester mn in
Olmsted County is a county located in the U.S. state of Minnesota. As of the 2010 census, the population was 144,248. Its county seat and largest city is Rochester. The county was founded in 1855 and named for David Olmsted, a member of the first territorial council and the first mayor of St. Paul. Olmsted County is part of the Rochester, MN Metropolitan Statistical Area.