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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
Lewis and Clark County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 70,973. Its county seat is Helena, the state capital. The numerical designation for Lewis and Clark County (used in the issuance of the state's license plates) is 5. The county was established on June 2, 1865 as one of the nine original counties of the Territory of Montana named Edgerton County in honor of Sidney Edgerton, first Governor of the Territory of Montana, and was renamed Lewis and Clark County on March 1, 1868 in honor of explorers Meriwether Lewis and William Clark.
Lewis and Clark County is part of the Helena, Montana Micropolitan Statistical Area.
Timeline
Date | Event | Source
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1865 | County formed | Source:Red Book: American State, County, and Town Sources
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1865 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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1867 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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1867 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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1867 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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1870 | First census | Source:Population of States and Counties of the United States: 1790-1990
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1895 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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1900 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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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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1870 | 5,040
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1880 | 6,521
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1890 | 19,145
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1900 | 19,171
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1910 | 21,853
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1920 | 18,660
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1930 | 18,224
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1940 | 22,131
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1950 | 24,540
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1960 | 28,006
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1970 | 33,281
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1980 | 43,039
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1990 | 47,495
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Research Tips
External links
www.genealogylinks.net/usa/montana/
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