Jefferson County
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A county of Alabama, United States. County seat: Birmingham.
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A county of Arkansas, United States. County seat: Pine Bluff.
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A county of Colorado, United States. County seat: Golden.
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A county of Florida, United States. County seat: Monticello.
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A county of Georgia, United States. County seat: Louisville.
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A county of Idaho, United States. County seat: Rigby.
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A county of Illinois, United States. County seat: Mount Vernon.
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A county of Indiana, United States. County seat: Madison.
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A county of Iowa, United States. County seat: Fairfield.
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A county of Kansas, United States. County seat: Oskaloosa.
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A county of Kentucky, United States. County seat: Louisville.
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A county of Mississippi, United States. County seat: Fayette.
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A county of Missouri, United States. County seat: Hillsboro.
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A county of Montana, United States. County seat: Boulder.
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A county of Nebraska, United States. County seat: Fairbury.
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A county of New York, United States. County seat: Watertown.
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A county of Ohio, United States. County seat: Steubenville.
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A county of Oklahoma, United States. County seat: Waurika.
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A county of Pennsylvania, United States. County seat: Brookville.
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A county of Tennessee, United States. County seat: Dandridge.
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A county of Texas, United States. County seat: Beaumont.
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A county of Washington, United States. County seat: Port Townsend.
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A county of West Virginia, United States. County seat: Charles Town.
Jefferson County
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A county of Oregon, United States. County seat: Madras.
Jefferson County
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A county of Wisconsin, United States. County seat: Jefferson.