NOTE: Gray indicates insufficient data or a suppressed estimate.
Broadband adoption rates across South Dakota exhibit a stark urban-rural divide, with zip codes surrounding Sioux Falls in the southeast and the Rapid City area in the southwest generally achieving 85–95%+ coverage, while large swaths of the central and western regions—particularly areas overlapping tribal lands such as the Pine Ridge and Cheyenne River reservations—fall below 50%. A notable cluster of very low connectivity (dark purple, near 0–30%) is visible in the south-central part of the state, contrasting sharply with pockets of near-universal broadband access (bright yellow) scattered among smaller communities in the northeast and along the I-29 corridor. The northwestern quadrant displays considerable heterogeneity, with adjacent zip codes often differing by 20–30 percentage points, suggesting that broadband infrastructure investment has been highly uneven at the local level.
Data: U.S. Census Bureau, 2023 ACS
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