Ontonagon Aviation: Supplier of aerial photography for Northern Michigan, including scenic, real-estate, commercial and digital enhancement.
Ontonagon County Historical Society: Provides history and information about the museum and lighthouse.
Ontonagon Memorial Hospital: Hospital and long term care facility. Physician directory and health fair events.
Porcupine Mountains Wilderness State Park: The park's 60,000 acres are one of the few remaining large wilderness areas in the Midwest.