Ontonagon County Chamber of Commerce 
424 River Street(Information Center); P.O. Box 266
Ontonagon, MI 49953

Ontonagon County Genealogical Society 
P.O. Box 258
Ontonagon, MI

Porcupine Mountains Ontonagon Area C.V.B. 
P.O. Box 1
Ontonagon, MI 49953