363 S MILL ST, Sumpter, OR, 97877, Baker County. $265,000 • 0.94 acres. 3 beds • 2 baths • 1,280 sqft. 1015 MARKET RD, Sumpter, OR, 97877, Baker County. Home - United States - Oregon - Eastern Oregon - Baker County - Sumpter. LandWatch has 7 land listings for sale in Sumpter, OR. Browse our Sumpter, OR land for sale listings, view …