The St. Croix Chippewa Indians (Ojibwe language: Manoominikeshiinyag, the "Ricing Rails") are a historical Band of Ojibwe located along the St. Croix River, which forms the boundary between the U.S. states of Wisconsin and Minnesota. The majority of the St. Croix Band are divided into two groups: the federally recognized St. Croix Chippewa Indians of Wisconsin, and the St. Croix Chippewa Indians of Minnesota, who are one of four constituent members forming the federally recognized Mille Lacs Band of Ojibwe. The latter is one of six bands in the federally recognized Minnesota Chippewa Tribe.
The Manoominikeshiinyag were one of the three major Bands forming the Biitan-akiing-enabijig (Border Sitters), named because of their proximity to the Eastern Dakota peoples. In turn, the Biitan-akiing-enabijig were a sub-Nation of the Gichigamiwininiwag (Lake Superior Men).
The St. Croix Band arrived in the area nearly 600 years ago; according to their oral tradition, they were directed to move southward from Lake Superior to "the place where there is food upon the waters." In colonizing the St. Croix River valley and its tributaries, the St. Croix Band entered into a fierce territorial dispute with the Eastern Dakota and the Fox. Eight other Native American Tribes were also located in the St. Croix River Valley.
To this day in the Ojibwe language, the headwaters of the St. Croix River is called "Manoominikeshiinyag-ziibi" (Ricing Rail River), the St. Croix River below the confluence of the Namekegon River as "Gichi-ziibi" (Big River) and below the confluence of Trade River as "Jiibayaatigo-ziibi" (Grave-marker River). The name "St. Croix River" was based on the "Jiibayaatigo-ziibi" name of the river.