Delta County is a county in the Upper Peninsula in the U.S. state of Michigan. As of the 2020 census, the population was 36,903. The county seat is Escanaba. The county was surveyed in 1843 and organized in 1861. Its name originates from the Greek letter delta (Δ), which refers to the triangular shape of the original county which included segments of Menominee, Dickinson, Iron, and Marquette counties. Recreation and forest products are major industries, and crops include hay, corn, small grains, potatoes, and strawberries.

Schoolcraft County is a county located in the Upper Peninsula of the U.S. state of Michigan. As of the 2020 census, the population was 8,047, making it Michigan's fourth-least populous county. The county seat is Manistique, which lies along the northern shore of Lake Michigan. The county is named in honor of Henry Schoolcraft, who explored the area with the expedition of Lewis Cass. The county was founded in 1843 and organized in 1876. The county is largely rural and forested, with much of its western portion within Hiawatha National Forest.