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- source: Getty Thesaurus of Geographic Names
- source: Family History Library Catalog
- the text in this section is copied from an article in Wikipedia
St. Clair County is a county located in the U.S. state of Michigan and bordering the west bank of the St. Clair River. As of the 2020 Census, the population was 160,383. It is the 13th-most populous county in the state. The county seat is Port Huron, located at the north end of the St. Clair River at Lake Huron.[1] The county was created September 10, 1820, and its government was organized in 1821.[1] Located northeast of Detroit, St. Clair County is part of the Detroit-Warren-Dearborn, MI Metropolitan Statistical Area. Geographically, it lies in the Thumb area of eastern Michigan.
Timeline
| Date | Event | Source
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| 1820 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1821 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1828 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1830 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1833 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1837 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1850 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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| 1868 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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Population History
- source: Source:Population of States and Counties of the United States: 1790-1990
| Census Year | Population
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| 1830 | 1,114
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| 1840 | 4,606
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| 1850 | 10,420
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| 1860 | 26,604
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| 1870 | 36,661
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| 1880 | 46,197
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| 1890 | 52,105
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| 1900 | 55,228
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| 1910 | 52,341
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| 1920 | 58,009
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| 1930 | 67,563
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| 1940 | 76,222
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| 1950 | 91,599
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| 1960 | 107,201
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| 1970 | 120,175
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| 1980 | 138,802
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| 1990 | 145,607
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Research Tips
External links
www.rootsweb.com/~mistcla/index.html
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