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Jackson County (Mich.)
Located in south-central Michigan, the county is considered to be one of Michigan's ten Cabinet Counties, in this case named for President Jackson himself. The county seat is also called Jackson.
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Berrien County (Mich.)
Located on Lake Michigan and the Indiana border in the far southwestern corner of the state, the county is one of Michigan's ten Cabinet Counties. It was named for John M. Berrien, President Jackson's Attorney General. The county seat is St. Joseph.
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Washtenaw County (Mich.)
Located in southeastern Michigan, Washtenaw County is the home of both the University of Michigan and Eastern Michigan University. Ann Arbor is the county seat.
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Oakland County (Mich.)
Located in southeastern Michigan, the county is part of the greater Detroit metropolitan area. The county seat is Pontiac.
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Livingston County (Mich.)
Located in southeastern Michigan, the county is one of Michigan's "Cabinet counties," named for a member of President Andrew Johnson's Cabinet; in this case, Edward Livingston, Secretary of State. The county seat is Howell.
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Lenawee County (Mich.)
The county is located on Michigan's southern border, near Toledo, Ohio. The county seat is Adrian.
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Ionia County (Mich.)
The county is located near the center of Michigan's Lower Peninsula. The county seat is also named Ionia.
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Ingham County (Mich.)
Located in south-central Michigan, the county is one of Michigan's "Cabinet counties," named for a member of President Andrew Johnson's Cabinet; in this case, Samuel D. Ingham, Secretary of the Treasury. The county seat is Mason.
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Calhoun County (Mich.)
Located in south-central Michigan, the county contains the city of Battle Creek. The county seat is Marshall.
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Wayne County (Mich.)
The county is located in the southeast corner of Michigan, bordering Ontario, Canada, and the county seat is Detroit. It was named for Revolutionary War General "Mad Anthony" Wayne.
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Cass County (Mich.)
The county is located in the southwestern corner of Michigan, bordering Indiana near South Bend. The county seat is Cassopolis. The county was named for Lewis Cass, who was territorial Govermor at the time the county was established.