Hours Of Operations NorthWestern Energy Ohio Zanesville NorthWestern Energy Hours of Operation and Locations in Zanesville, OH 4.8 - 111 votes 1 Locations in Zanesville www.northwesternenergy.com NorthWestern Energy Hours Category: Home & Garden NorthWestern Energy - Zanesville, OH 43701 (888) 467-2669 View Store Details Explore ZanesvilleView More Apparel Sam's ClubTJ MaxxKmartBig LotsCato Sports VansColemanHat WorldFinish LineBlades Jewelry Sam's ClubHobby LobbyCatoDeb ShopsZales Recommend For You NSTAR Orlando Utilities Commission Otter Tail Power Company Peoples Gas Pepco Runnings Farm & Fleet Tucson Electric Power United Power Urgent Care of Connecticut Aero Energy