Olmsted County is a county located in the U.S. state of Minnesota. As of the 2020 census, the population is 162,847, and was estimated to be 166,731 in 2025, making it the seventh-most populous county
Olmsted County Government Center (pre-expansion)
The Helleckson Homestead, built about 1850, preserved in Olmsted County Oxbow Park (destroyed in 2019 floods)
Rochester is a city in and the county seat of Olmsted County, Minnesota, United States. It is located along rolling bluffs on the Zumbro River's south fork in Southeast Minnesota. The population was 1
Olmsted County, Minnesota
…is 162,847, and was estimated to be 166,731 in 2025, making it the seventh-most populous county in Minnesota. The county seat and the largest city is Rochester. Olmsted County is part of the Rochester metropolitan area…