Information on GNC in Ottawa, OH 45875 Outlet Note Regular Brands GNC Ohio Ottawa 328960 Rating 4.7 based on 97 votes Address 305 West Main Street Ottawa, OH 45875 Phone Hours may vary in different stores. For accurate hours, please contact each store directly. Suite643 Hours may vary in different stores. For accurate hours, please contact each store directly. Nearby GNC Outlet GNC Outlet - Ada GNC Outlet - Bowling Green GNC Outlet - Bellefontaine GNC Outlet - Brookville People Also Viewed