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South Dakota Lakes
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Lake Oahe
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| County Name | Population |
Water Area Percentage |
Land Area Percentage |
| Dewey County, SD | 5,972 | 5.85% | 94.15% |
| Hughes County, SD | 16,481 | 7.42% | 92.58% |
| Potter County, SD | 2,693 | 3.56% | 96.44% |
| Stanley County, SD | 2,772 | 4.86% | 95.14% |
| Sully County, SD | 1,556 | 5.93% | 94.07% |
