1790 Allegheny County, Pennsylvania Census
- Free 1790 Census Form for your Research
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- Hosted at Pennsylvania USGenWeb Archives
- Hosted at USGenWeb Census Project
- Hosted at Butler County, Pennsylvania PAGenWeb
- Hosted at Census Guide
1800 Allegheny County, Pennsylvania Census
- Free 1800 Census Form for your Research
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- Hosted at Pennsylvania USGenWeb Archives
- Hosted at Census Guide
1810 Allegheny County, Pennsylvania Census
- Free 1810 Census Form for your Research
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- Hosted at Census Guide
1820 Allegheny County, Pennsylvania Census
- Free 1820 Census Form for your Research
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- Hosted at Census Guide
1830 Allegheny County, Pennsylvania Census
- Free 1830 Census Form for your Research
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- Hosted at Census Guide
1840 Allegheny County, Pennsylvania Census
- Free 1840 Census Form for your Research
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1850 Allegheny 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
- Franklin Township
- Ohio Township 1 of 3
- Ohio Township 2 of 3
- Ohio Township 3 of 3
- Pine Township 1 of 3
- Pine Township 2 of 3
- Pine Township 3 of 3
- West Deer Township, Surname A-L
- West Deer Township, Surname M-Z
- Partial Text
- West Deer Township File 1 of 3
- West Deer Township File 2 of 3
- West Deer Township File 3 of 3
- Hosted at Census Guide
1860 Allegheny County, Pennsylvania Census
- Free 1860 Census Form for your Research
- Free 1860 Census Images and Index
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- Hosted at Pennsylvania USGenWeb Archives
- Hosted at Census Guide
1870 Allegheny 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 Census Guide
1880 Allegheny County, Pennsylvania Census
- Free 1880 Census Form for your Research
- Free 1880 Census Transcription
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1890 Allegheny County, Pennsylvania Census
- Free 1890 Census Form for your Research
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- Hosted at USGenWeb Census Project
- Hosted at Census Guide
1900 Allegheny County, Pennsylvania Census
- Free 1900 Census Form for your Research
- Free 1900 Census Images and Index
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- Free 1900 Census Index
- Free 1900 Census Transcription (partial)
- 1900 Federal Census File 1 of 3
- 1900 Federal Census File 2 of 3
- 1900 Federal Census File 3 of 3
- File 1 of 4 for ED:354
- File 2 of 4 for ED:354
- File 3 of 4 for ED:354
- File 4 of 4 for ED:354
- File 1 of 3 for ED:355
- File 2 of 3 for ED:355
- File 3 of 3 for ED:355
- File 1 of 3 for ED:356
- File 2 of 3 for ED:356
- File 3 of 3 for ED:356
- File 1 of 3 for ED:357
- File 2 of 3 for ED:357
- File 3 of 3 for ED:357
- Hosted at Pennsylvania USGenWeb Archives
- Carnegie Borough, File 1
- Carnegie Borough, File 2
- Carnegie Borough, File 3
- Carnegie Borough, File 4
- Carnegie Borough, File 5
- Carnegie Borough, File 6
- Carnegie Borough, File 7
- Hosted at Census Guide
1910 Allegheny County, Pennsylvania Census
- Free 1910 Census Form for your Research
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- Hosted at USGenWeb Census Project
- Hosted at Census Guide
1920 Allegheny County, Pennsylvania Census
- Free 1920 Census Form for your Research
- Free 1920 Census Images and Index (partial)
- Hosted at Ancestry.com – Ancestry Free Trial
- Free 1920 Census Index (partial)
- Free 1900 Census Transcription (partial)
- File 1 of 7 for Heidelberg Borough, ED:131
- File 2 of 7 for Heidelberg Borough, ED:131
- File 3 of 7 for Heidelberg Borough, ED:131
- File 4 of 7 for Heidelberg Borough, ED:131
- File 5 of 7 for Heidelberg Borough, ED:131
- File 6 of 7 for Heidelberg Borough, ED:131
- File 7 of 7 for Heidelberg Borough, ED:131
- File 1 of 6 for Mt. Lebanon Twp, Precinct One
- File 2 of 6 for Mt. Lebanon Twp, Precinct One
- File 3 of 6 for Mt. Lebanon Twp, Precinct One
- File 4 of 6 for Mt. Lebanon Twp, Precinct One
1930 Allegheny County, Pennsylvania Census
- Free 1930 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at USGenWeb Census Project
- Hosted at Census Guide