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| The territory of Wisconsin was created by act of Congress in 1836 out of what had been till then a part of the Territory of Michigan. Walworth County was set apart in 1839, having been before that date included in Racine County. It was named in honor of Chancellor Reuben H. Walworth of New York State. |
| The town of Elkhorn, located at the exact geographical center of the county, was selected as the county seat. The county forms an exact square, 24 miles on a side, containing 576 square miles. It is divided, checkerboard fashion, into sixteen townships of 36 square miles each-each a square, 6 miles on a side |
| The oldest single institution of the community life of the entire county is the "County Fair". The first exhibition was held in East Troy in October of 1850, moving to Elkhorn in 1851. |
| Susan Howe's Walworth County Ancestors | Errol Cross's Walworth County Ancestors |
| Dane | Jefferson | Kenosha | Racine |
| Rock | Waukesha | . |
| Boone | Carroll | Jo Davies | Lee |
| McHenry | Ogle | Stephenson | Winnebago |
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