Photo: Charles Chapman House, ca. 1858, 418 McCauley Street, Mankato, MN. Listed on the National Register of Historic Places in 1980. Photographed by User:Bobak Ha'Eri (own work), 2009, [cc-by-3.0 (creativecommons.org/licenses/by/3.0)], via Wikimedia Commons, accessed July, 2016.
Blue Earth County administrative offices are located at 204 South Fifth Street, Mankato, MN 56001; phone: 507‑304‑4150.
Blue Earth County was organized in 1853, the same year that the U.S. Congress ratified treaties that extinguished Indian title to land in the State west of the Mississippi.