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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
Mercer County is a county located in the U.S. state of Pennsylvania. As of the 2020 census, the population was 110,652. Its county seat is Mercer, and its largest city is Hermitage. The county was created in 1800 and later organized in 1803.
Mercer County is included in the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area.
Timeline
Population History
- source: Source:Population of States and Counties of the United States: 1790-1990
| Census Year | Population
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| 1800 | 3,228
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| 1810 | 8,277
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| 1820 | 11,681
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| 1830 | 19,729
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| 1840 | 32,873
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| 1850 | 33,172
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| 1860 | 36,856
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| 1870 | 49,977
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| 1880 | 56,161
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| 1890 | 55,744
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| 1900 | 57,387
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| 1910 | 77,699
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| 1920 | 93,788
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| 1930 | 99,246
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| 1940 | 101,039
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| 1950 | 111,954
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| 1960 | 127,519
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| 1970 | 127,175
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| 1980 | 128,299
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| 1990 | 121,003
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Research Tips
External links
- Outstanding guide to Mercer County family history and genealogy resources (FamilySearch Research Wiki). Birth, marriage, and death records, censuses, wills, deeds, county histories, cemeteries, churches, newspapers, libraries, and genealogical societies.
- www.mcc.co.mercer.pa.us/
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