The Gillett Grove site (13CY2) is a post-contact Oneota tradition settlement located along the Little Sioux River in northwest Iowa. Since 1995, field excavations have been conducted each summer as an archaeological field school at Iowa Lakeside Laboratory. Gillett Grove is one of few post-contact Oneota settlements in northwest Iowa. These post-contact Oneota sites have traditional material culture associated with European trade goods, such as glass trade beads, iron axes, and Jesuit rings. The archaeological research conducted at Gillett Grove expands on what is known about types of cultural transformations on the Prairie-Plains with the introduction of European goods.