Passport Application Services - Ellensburg 100 E 3rd Ave Ellensburg, WA 98926 Phone : (509) 962-4360 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (509) 925-3716 Post Office - Ellensburg 100 E 3rd Ave Ellensburg, WA 98926 Phone : (509) 962-4360 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (509) 925-3716