From Left/West to Right/East:

Dunes Moraine District serves Porter County, including Chesterton, Valparaiso, Porter, Kouts, Hebron, Boone Grove, Wheeler, and portions of Westville.

Potawatomi District serves LaPorte County and Starke County in Indiana and portions of Berrien County, Michigan, including Michigan City, LaPorte, Rolling Prairie, Westville, Wanatah, Knox, and New Buffalo and Three Oaks in Michigan.

Algonquian District serves Berrien County in Michigan and St. Joseph County and Marshall County in Indiana, including Bremen, Niles, South Bend, Mishawaka, Plymouth, Osceola, Argos, and New Carlisle.

Pioneer Trails District serves Cass County in Michigan and Elkhart County in Indiana including Cassopolis, Elkhart, Goshen, Edwardsburg, and Nappanee.