Oronoco is a city in Olmsted County, Minnesota, United States, along the Middle Fork of the Zumbro River. The population was 1,802 at the 2020 census.
Oronoco Town Hall
Olmsted County, Minnesota
Olmsted County is a county in the U.S. state of Minnesota. As of the 2020 census, the population is 162,847. Its county seat and most populous city is Rochester.
Olmsted County Government Center (pre-expansion)
The Helleckson Homestead, built about 1850, preserved in Olmsted County Oxbow Park (Destroyed in 2019 floods)
Soils of Olmsted County