Blair County, Pennsylvania was formed from Bedford and Huntingdon counties in 1846.
1850 Blair County, Pennsylvania Census
- Free 1850 Census Form for your Research
- Free 1850 Census Images (partially indexed)
- Hosted at Ancestry.com – Ancestry Free Trial
Hosted at Pennsylvania USGenWeb Archives
- Hosted at USGenWeb Census Project
- Surname Index A
- Surname Index B
- Surname Index C
- Surname Index D
- Surname Index E-F
- Surname Index G
- Surname Index H
- Surname Index I-K
- Surname Index L
- Surname Index M
- Surname Index N-Q
- Surname Index R
- Surname Index S
- Surname Index T-V
- Surname Index W
- Surname Index Y-Z
- Mortality Index
- Mortality Census
- Woodbury Township 1 of 2
- Woodbury Township 2 of 2
- Williamsburg in Woodbury Township
- Tyrone Township, 1 of 2
- Tyrone Township, 2 of 2
- Snyder Township, 1 of 2
- Snyder Township, 2 of 2
- North Woodbury Township, 1 of 3
- North Woodbury Township, 2 of 3
- North Woodbury Township, 3 of 3
- Martinsburg Borough
- Hollidaysburg Borough, 1 of 4
- Hollidaysburg Borough, 2 of 4
- Hollidaysburg Borough, 3 of 4
- Hollidaysburg Borough, 4 of 4
- Huston Township, 1 of 2
- Huston Township, 2 of 2
- Catharine Township. 1 of 2
- Catharine Township. 2 of 2
- Greenfield Township, 1 of 2
- Greenfield Township, 1 of 2
- Gaysport Borough
- Frankstown Township, 1 of 3
- Frankstown Township, 2 of 3
- Frankstown Township, 3 of 3
- Juniata Township, 1 of 3
- Juniata Township, 1 of 3
- Juniata Township, 1 of 3
- Blair Township, 1 of 2
- Blair Township, 2 of 2
- Antis Township, 1 of 4
- Antis Township, 2 of 4
- Antis Township, 3 of 4
- Antis Township, 4 of 4
- Allegheny Township, 1 of 4
- Allegheny Township, 2 of 4
- Allegheny Township, 3 of 4
- Allegheny Township, 4 of 4
Hosted at Census Guide
1860 Blair 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 Blair County, Pennsylvania Census
- Free 1870 Census Form for your Research
- Free 1870 Census Images and Index
- Hosted at Ancestry.com – Ancestry Free Trial
Hosted at Pennsylvania USGenWeb Archives
Index Head of Household/Other Surnames, Second Ward, Altoona
Index Heads of Household/Other Surnames, Third Ward, Altoona
Index Heads of Household/Other Surnames, Fourth Ward, Altoona
Index Heads of Household/Other Surnames, Fifth Ward, Altoona
Index Heads of Household/Other Surnames, Altoona, Sixth Ward
- Hosted at Census Guide
1880 Blair County, Pennsylvania Census
- Free 1880 Census Form for your Research
- Free 1880 Census Transcription
- Hosted at Ancestry.com – Ancestry Free Trial
Hosted at Pennsylvania USGenWeb Archives
City of Altoona, Part 1
City of Altoona, Part 2
- Hosted at Census Guide
1890 Blair 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 Blair 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 Blair County, Pennsylvania Census
- Free 1910 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1920 Blair 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 Blair County, Pennsylvania Census
- Free 1930 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide