Butler County, Pennsylvania was formed from Allegheny County in 1800.
1800 Butler County, Pennsylvania Census
- Free 1800 Census Form for your Research
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- Hosted at Butler County, Pennsylvania PAGenWeb
- Hosted at Pennsylvania USGenWeb Archives
- Hosted at Census Guide
1810 Butler County, Pennsylvania Census
- Free 1810 Census Form for your Research
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- Hosted at Pennsylvania USGenWeb Archives
Hosted at Census Guide
1820 Butler County, Pennsylvania Census
- Free 1820 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Pennsylvania USGenWeb Archives
- Hosted at Butler County, Pennsylvania PAGenWeb
- Hosted at Census Guide
1830 Butler County, Pennsylvania Census
- Free 1830 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1840 Butler County, Pennsylvania Census
- Free 1840 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1850 Butler County, Pennsylvania Census
- Free 1850 Census Form for your Research
- Free 1850 Census Images (partially indexed)
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Hosted at Pennsylvania USGenWeb Archives
- Hosted at Census Guide
1860 Butler County, Pennsylvania Census
- Free 1860 Census Form for your Research
- Free 1860 Census Images and Index
- Hosted at Ancestry.com – Ancestry Free Trial
Hosted at Pennsylvania USGenWeb Archives
- Hosted at Census Guide
1870 Butler County, Pennsylvania Census
- Free 1870 Census Form for your Research
- Free 1870 Census Images and Index
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Hosted at Pennsylvania USGenWeb Archives
Hosted at USGenWeb Census Project
- Hosted at Census Guide
1880 Butler County, Pennsylvania Census
- Free 1880 Census Form for your Research
- Free 1880 Census Transcription
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Hosted at USGenWeb Census Project
- Hosted at Census Guide
1890 Butler County, Pennsylvania Census
- Free 1890 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
Hosted at USGenWeb Census Project
- Hosted at Census Guide
1900 Butler County, Pennsylvania Census
- Free 1900 Census Form for your Research
- Free 1900 Census Images and Index
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1910 Butler County, Pennsylvania Census
- Free 1910 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1920 Butler County, Pennsylvania Census
- Free 1920 Census Form for your Research
- Free 1920 Census Images and Index (partial)
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1930 Butler County, Pennsylvania Census
- Free 1930 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide