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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
Yuma County is a county located in the southwestern corner of the U.S. state of Arizona. As of the 2010 census, its population was 195,751. The county seat is Yuma.
Yuma County is part of the Yuma Metropolitan Statistical Area.
The county's southwestern Colorado River border forms a 4-state division between southeast California and southwest Arizona, and northeast Baja California state, Mexico with northwest Sonora state.
Timeline
| Date | Event | Source
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| 1864 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1864 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1864 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1864 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1864 | 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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| 1888 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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| 1990 | 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 | 1,621
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| 1880 | 3,215
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| 1890 | 2,671
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| 1900 | 4,145
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| 1910 | 7,733
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| 1920 | 14,904
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| 1930 | 17,816
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| 1940 | 19,326
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| 1950 | 28,006
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| 1960 | 46,235
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| 1970 | 60,827
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| 1980 | 90,554
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| 1990 | 106,895
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Note: La Paz County (1980 pop. 12,557) was formed from Yuma County in 1983.
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