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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
Pinal County is located in the central part of the U.S. state of Arizona. As of the 2010 census, its population was 375,770. The county seat is Florence.
Pinal County contains parts of the Tohono O'odham Nation, the Gila River Indian Community and the San Carlos Apache Indian Reservation, as well as the entirety of the Ak-Chin Indian Community.
Because Pinal County is located between Arizona's two largest metropolitan regions, Phoenix and Tucson, suburban growth southward from greater Phoenix has begun to spread into the northern parts of the county; similarly, growth northward from Tucson is spreading into the southern portions of the county. The Pinal County cities of Maricopa and Casa Grande, as well as many unincorporated areas, have shown accelerated growth patterns in recent years; such suburban development is likely to continue for the foreseeable future.
Timeline
| Date | Event | Source
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| 1875 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1875 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1875 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1875 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1880 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1883 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1887 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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| 1890 | 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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| 1880 | 3,044
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| 1890 | 4,251
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| 1900 | 7,779
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| 1910 | 9,045
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| 1920 | 16,130
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| 1930 | 22,081
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| 1940 | 28,841
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| 1950 | 43,191
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| 1960 | 62,673
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| 1970 | 67,916
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| 1980 | 90,918
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| 1990 | 116,379
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