Upper Sioux Agency State Park, Archaeological site and former state park in Yellow Medicine County, Minnesota.
Upper Sioux Agency State Park is an archaeological site with prehistoric remains and historic structures spread across land along the Minnesota River. The grounds contain evidence of past settlements and occupation dating back generations.
The site began in 1854 when the U.S. government created the Yellow Medicine Agency to manage affairs with Dakota tribes under a treaty agreement. This establishment marked the beginning of governmental oversight and administration in the region.
The site holds deep meaning for the Dakota people as a place connected to their ancestors and history in this region. Today the Upper Sioux Community maintains the land as part of their heritage and identity.
The park is no longer open for public visits as of 2024, having been transferred to the Upper Sioux Community. Visitors interested in the site should contact the community directly to learn about any guided access opportunities or cultural programs.
For 61 years the site operated as a state park before the Minnesota legislature transferred full ownership to the Upper Sioux Community in 2023. This land return represents a significant step in restoring control of the space to those with the deepest ties to its history.
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