Post Office - Chelan Falls 67 Chestnut St Chelan Falls, WA 98817 Phone : (509) 682-4105 Post Office - Chelan Falls Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--postal Service, Chelan Falls 67 Chestnut St Chelan, WA 98816 Phone : (509) 682-4105 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools