Stanfield (English: /ˈstænfiːld/) is a city in Umatilla County, Oregon, United States.According to the United States Census Bureau, the city has a total area of 1.53 square miles (3.96 km2), all of it land.[6] The firm had interests in the Umatilla area and purchased 4,000 acres northeast of Echo.[6] They established a large ranch there and a store and small community followed; they were all named for Foster.[6] In 1882, the Oregon Railway & Navigation Company siding and stop was named "Fosters".