Population Non-Hispanic White % by Zip Code (ZCTA5) — South Dakota

NOTE: Gray indicates insufficient data or a suppressed estimate.

The western half of South Dakota displays significantly lower non-Hispanic white percentages, particularly in zip codes overlapping the Pine Ridge, Rosebud, Cheyenne River, and Standing Rock reservations, where values drop below 20%. The eastern third of the state is predominantly yellow, indicating non-Hispanic white populations consistently above 90%, with notable exceptions around the Sioux Falls and Yankton areas where greater demographic diversity appears. A sharp demographic boundary runs roughly along the Missouri River corridor, separating the more homogeneous eastern region from the west's patchwork of reservation and non-reservation zip codes.

Data: U.S. Census Bureau, 2023 ACS

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