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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
Oklahoma County is a county located in the central part
of the U.S. state of Oklahoma. As of the 2010 census, the population was 718,633. The county seat and principal city is Oklahoma City. Oklahoma County is at the heart of the Oklahoma City Metropolitan Statistical Area and is the most populous county in the state.
Oklahoma County is one of seven counties in the United States to share the same name as a state (the other six counties are Arkansas County, Arkansas, Hawaii County, Hawaii, Idaho County, Idaho, Iowa County, Iowa, New York County, New York and Utah County, Utah).
Timeline
| Date | Event | Source
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| 1889 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1889 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1890 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1890 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1890 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1890 | Probate 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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| 1908 | 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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| 1890 | 11,742
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| 1900 | 25,915
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| 1907 | 55,849
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| 1910 | 85,232
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| 1920 | 116,307
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| 1930 | 221,738
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| 1940 | 244,159
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| 1950 | 325,352
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| 1960 | 439,506
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| 1970 | 526,805
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| 1980 | 568,933
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| 1990 | 599,611
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