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Blair County, PA Demographics

Blair County, PA is the 28th most populous of 67 counties in Pennsylvania, with 122,830 residents across 525 square miles. That is about 234 people per square mile.

At the 2020 census

Population 122,830
Land area 525 sq mi
Density 234 / sq mi

Data: 2020 Census · American Community Survey 2024

How Blair County compares to the US

We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.

Central Location: Blair County, PA

Measured from the county's main population center using 2020 census blocks.

We're computing the drive-time and radius areas around Blair County, PA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.

Census tracts in Blair County, PA

Name Population Sq mi Per sq mi
Census Tract 109 7,399 48.8 152
Census Tract 113 5,561 56.6 98
Census Tract 115 5,298 40.7 130
Census Tract 111.02 4,687 13.3 352
Census Tract 110.02 4,301 7.5 573
Census Tract 101.01 4,266 72.3 59
Census Tract 105 4,155 29.2 143
Census Tract 1009 3,993 0.9 4,222
Census Tract 1012 3,895 1.5 2,532
Census Tract 104.04 3,871 16.8 230
Census Tract 116 3,788 36.3 104
Census Tract 1014 3,552 0.6 6,325
Census Tract 1017 3,541 0.5 7,861
Census Tract 107.01 3,484 5.1 683
Census Tract 108 3,441 63.6 54
Census Tract 1015 3,373 1.1 3,205
Census Tract 110.01 3,360 48.0 70
Census Tract 1005 3,309 0.4 7,583
Census Tract 107.02 3,297 20.5 161
Census Tract 112.01 3,217 1.2 2,708
Census Tract 1003 3,179 0.5 6,765
Census Tract 1016 3,170 0.4 7,121
Census Tract 1018 2,902 0.8 3,682
Census Tract 101.02 2,852 1.0 2,977
Census Tract 101.03 2,628 1.1 2,440
Census Tract 104.03 2,607 44.0 59
Census Tract 1006 2,445 0.4 6,512
Census Tract 112.02 2,424 1.1 2,122
Census Tract 114 2,384 0.8 2,961
Census Tract 1007 2,366 0.6 4,220
Census Tract 1002 2,202 1.1 1,990
Census Tract 106 2,159 6.0 361
Census Tract 104.01 1,827 0.5 3,839
Census Tract 1004 1,666 0.4 4,342
Census Tract 1008 1,663 0.4 4,322
Census Tract 111.01 1,581 0.9 1,709
Census Tract 1011 1,490 0.4 3,928
Census Tract 1019 1,463 0.2 6,604

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About this page

This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.

Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.

Read how BlockAtlas computes population within an area →