Clay County, MN

Settlement & growth (pre-1960)

Before European settlement, the area now known as Clay County was inhabited by the Dakota (Sioux) and Ojibwe (Chippewa) nations, who used the Red River Valley for hunting, fishing, and seasonal camps. The region was part of the vast territory claimed by France and later the United States through the Louisiana Purchase of 1803. The first permanent non-Native settlement began in the 1850s, spurred by the 1854 Treaty of Washington, which opened the land to American settlers. The town of Moorhead was founded in 1871 as a railroad town on the Northern Pacific Railway, quickly becoming the county’s commercial and transportation hub.

The major population wave came from Scandinavian immigrants—Norwegians and Swedes—beginning in the 1870s, drawn by the promise of fertile farmland in the Red River Valley. These settlers established farming communities like Glyndon (founded 1872), Hawley (founded 1873), and Barnesville (founded 1874), where their descendants remain concentrated today. German immigrants also arrived in significant numbers during the same period, settling in areas like Ulen and Felton. The Homestead Act of 1862 and the subsequent railroad land grants were the primary pull factors, offering 160-acre parcels for a small filing fee. By 1900, the county’s population had reached roughly 17,000, overwhelmingly white and of Northern European descent.

The early 20th century saw continued agricultural expansion, with sugar beet farming becoming a major industry after the American Crystal Sugar Company built a processing plant in East Grand Forks (just north of the county) in 1926. This drew a smaller wave of Polish and Russian-German immigrants to the region, though Clay County itself remained less affected than neighboring counties. The Dust Bowl and Great Depression of the 1930s caused some out-migration, but the county’s population held relatively steady. Post-World War II, the GI Bill and the expansion of Minnesota State University Moorhead (then Moorhead State Teachers College) brought a new wave of domestic migrants—veterans and their families—who settled in Moorhead and the growing suburbs of Dilworth and Sabin. By 1960, the county’s population had grown to approximately 35,000, still overwhelmingly white and rural.

Modern era (post-1965)

The 1965 Hart-Cellar Act, which abolished national-origin quotas, had a minimal immediate impact on Clay County due to its remote location and lack of industrial job base. The foreign-born population remains very low at 1.8% today, far below the national average. The most significant demographic shift since 1965 has been domestic: the growth of Moorhead as a regional education and healthcare center. Minnesota State University Moorhead expanded its enrollment from about 4,000 in 1970 to over 5,500 today, attracting students from across the Upper Midwest and a small number of international students. This has slightly diversified the county, with the Asian (East/Southeast Asian) population reaching 1.4% and the Black population reaching 4.6%, largely concentrated in Moorhead near the university.

The Hispanic population, at 4.9%, has grown primarily through agricultural labor, particularly in sugar beet and potato farming. Many Hispanic families have settled in Moorhead and Barnesville, where seasonal work is available. The Indian (subcontinent) population remains tiny at 0.3%, mostly tied to professional roles at the university or regional healthcare systems. Suburbanization has been modest compared to national trends, with Dilworth and Glyndon seeing new housing developments as bedroom communities for Fargo-Moorhead commuters. The county’s overall racial composition has shifted only slightly: from 98% white in 1970 to 84.3% white today, with the change driven almost entirely by Hispanic and Black in-migration.