BLUE EARTH COUNTY, MN HISTORY AND LOOKUP
County History Books
*None Listed
Blue Earth County, Minnesota: A Genealogical Overview
Located in the heart of fertile south-central Minnesota, Blue Earth County is a region defined by its rich agricultural land and the dramatic bend of the Minnesota River. Its history is a complex story of its original Dakota inhabitants, the waves of European and American pioneers who settled its prairies, and the tragic U.S.-Dakota War of 1862, which profoundly shaped its development. Centered around its principal city of Mankato, the county today is a hub for agriculture, education, and regional commerce, built upon a deep and often conflicted past.
I. County Formation and Evolution
Understanding Blue Earth County’s formation from treaty lands and its subsequent boundary changes is essential for locating the earliest records for ancestors who settled in the region.
- 1853: County Formed: Blue Earth County was established on March 5, 1853, by an act of the Minnesota Territorial Legislature.
- Parent Entity: The county was created from territory ceded by the Dakota people in the Treaties of Traverse des Sioux and Mendota in 1851. Prior to its formal organization, the area was technically part of Wabasha County and Dakota County for administrative purposes, so the earliest territorial records may be found there.
- Subsequent County Formations: The original Blue Earth County was significantly larger than its present size. In 1860, the western portion of the county was partitioned off to create Watonwan County. Researchers with ancestors in that area must be aware of this boundary change.
- Name Origin: The county is named for the Blue Earth River, a major tributary of the Minnesota River. The name is a direct translation of the Dakota phrase “Mahkato Osa Watapa,” meaning “the river where blue earth is gathered,” which referred to the unique blue-green clay the Dakota prized as a pigment. The city of Mankato is a variation of this Dakota name.
- County Seat History: Mankato was designated as the county seat upon the county’s formation in 1853 and has remained the county seat ever since.
II. Settlement and Early History
- Early Inhabitants: For centuries, the region was the homeland of the Dakota people, particularly the Sisseton and Wahpeton bands. The confluence of the Blue Earth and Minnesota Rivers was a vital cultural and economic center for them. Numerous villages and trading posts existed in the area long before European settlement.
- Pioneer Settlement and Economy: Following the 1851 treaties, Euro-American settlement began rapidly, with the first pioneers arriving in 1852. Mankato was founded in 1852 and quickly grew due to its location on the river. The region’s history was irrevocably altered by the U.S.-Dakota War of 1862, which began nearby. The war’s tragic conclusion in Mankato, with the largest mass execution in U.S. history, led to the forced removal of the Dakota from Minnesota. Early settlers were primarily from New England and the mid-Atlantic states, followed by a large influx of German, Norwegian, and Swedish immigrants who established the agricultural foundation of the county’s economy.
III. Genealogical Records and Resources
This section provides practical information for locating ancestral records specific to Blue Earth County.
- Courthouse: The Blue Earth County Government Center is located at 410 S. 5th Street, Mankato, MN 56001. The County Recorder’s Office in this building is the primary repository for land records (deeds) and vital records. The Court Administrator’s office holds probate (wills and estates) and civil/criminal court case records.
- Vital Records:
- Birth and Death Records: Statewide registration in Minnesota began in 1908. These records are held by the Minnesota Department of Health. For records prior to 1908, researchers should contact the Blue Earth County Recorder’s Office. Coverage for these earlier records can be incomplete.
- Marriage Records: Marriage records from the county’s formation in 1853 to the present are held by the Blue Earth County Recorder’s Office.
- Libraries with Genealogy Collections:
- Blue Earth County Historical Society: Located at 424 Warren Street, Mankato, MN 56001. This is the most critical resource for local and family history, housing an extensive research center with photographs, manuscripts, maps, and local records.
- Blue Earth County Library: The main library, located in Mankato, has a local history collection, newspaper archives on microfilm, and other genealogical resources.
- Minnesota Historical Society (Gale Family Library): Located in St. Paul, this is the premier repository for statewide genealogical research, holding state census records, naturalization records, an extensive newspaper collection, and manuscript collections.
- Bordering Jurisdictions:
- Nicollet County, MN
- Le Sueur County, MN
- Waseca County, MN
- Faribault County, MN
- Martin County, MN
- Watonwan County, MN
- Brown County, MN