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Hillsborough County, NH Demographics

Hillsborough County, NH is the most populous of 10 counties in New Hampshire, with 422,937 residents across 877 square miles. That is about 483 people per square mile.

At the 2020 census

Population 422,937
Land area 877 sq mi
Density 483 / sq mi

Data: 2020 Census · American Community Survey 2024

How Hillsborough 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: Hillsborough County, NH

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

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

Census tracts in Hillsborough County, NH

Name Population Sq mi Per sq mi
Census Tract 29.03 8,349 13.7 610
Census Tract 29.01 8,202 10.1 814
Census Tract 24 7,564 1.6 4,772
Census Tract 112 7,432 3.1 2,396
Census Tract 28.02 6,875 2.2 3,144
Census Tract 29.02 6,771 9.0 750
Census Tract 106 6,716 0.9 7,493
Census Tract 142.02 6,391 5.1 1,253
Census Tract 10 6,318 4.8 1,303
Census Tract 152 6,302 15.4 409
Census Tract 27.02 6,298 15.5 405
Census Tract 109 6,275 1.1 5,480
Census Tract 18 6,117 0.6 10,528
Census Tract 200 6,108 42.8 143
Census Tract 142.01 5,957 9.7 616
Census Tract 143.02 5,877 6.9 846
Census Tract 26 5,862 4.7 1,242
Census Tract 108.02 5,820 0.9 6,524
Census Tract 2.04 5,684 3.5 1,613
Census Tract 114.01 5,682 4.2 1,352
Census Tract 9.02 5,636 1.8 3,080
Census Tract 122.02 5,635 2.4 2,385
Census Tract 25 5,510 1.7 3,297
Census Tract 162.02 5,471 17.6 311
Census Tract 151 5,451 18.5 295
Census Tract 1.03 5,418 1.7 3,208
Census Tract 11 5,418 1.9 2,827
Census Tract 123.01 5,392 8.9 603
Census Tract 101 5,310 2.2 2,367
Census Tract 21 5,293 0.6 9,024
Census Tract 114.02 5,165 1.6 3,303
Census Tract 121.01 5,157 4.1 1,263
Census Tract 210.01 5,152 37.4 138
Census Tract 104 5,042 1.5 3,359
Census Tract 215 5,015 71.8 70
Census Tract 110 4,874 2.0 2,439
Census Tract 2003 4,852 7.8 621
Census Tract 103.01 4,788 1.5 3,301
Census Tract 105 4,717 0.4 12,084
Census Tract 171.02 4,699 19.4 243
Census Tract 131.02 4,671 8.0 581
Census Tract 102.01 4,410 1.5 2,867
Census Tract 113 4,399 1.2 3,714
Census Tract 103.02 4,322 1.3 3,444
Census Tract 225.02 4,322 52.8 82
Census Tract 16 4,185 0.3 15,621
Census Tract 123.02 4,026 5.5 731
Census Tract 27.01 3,968 14.4 275
Census Tract 210.02 3,940 21.6 182
Census Tract 162.04 3,924 2.1 1,889
Census Tract 190 3,896 25.6 152
Census Tract 141.01 3,825 2.2 1,709
Census Tract 131.01 3,807 6.9 553
Census Tract 111.01 3,771 0.4 8,795
Census Tract 23 3,747 0.8 4,951
Census Tract 162.03 3,723 1.4 2,729
Census Tract 230.01 3,716 12.5 298
Census Tract 171.01 3,643 12.4 295
Census Tract 9.01 3,563 1.1 3,309
Census Tract 2005 3,533 5.9 598
Census Tract 2004 3,530 0.6 5,877
Census Tract 111.02 3,466 1.2 2,984
Census Tract 19 3,402 0.6 5,721
Census Tract 22 3,297 0.7 4,427
Census Tract 121.02 3,285 6.7 492
Census Tract 13 3,277 0.2 16,831
Census Tract 15 3,235 0.1 21,807
Census Tract 180.02 3,220 9.1 353
Census Tract 2001.01 3,167 7.9 402
Census Tract 255.02 3,141 34.9 90
Census Tract 7 3,119 0.5 6,445
Census Tract 3 3,081 0.2 15,486
Census Tract 255.01 3,060 17.1 179
Census Tract 2.03 3,057 0.7 4,093
Census Tract 1.04 3,019 1.0 3,153
Census Tract 161 3,013 4.4 685
Census Tract 230.02 2,702 25.6 106
Census Tract 2002.01 2,670 4.7 563
Census Tract 250 2,651 35.7 74
Census Tract 225.01 2,623 17.9 147
Census Tract 195.02 2,584 16.8 154
Census Tract 141.02 2,530 3.7 678
Census Tract 14 2,528 0.2 13,402
Census Tract 115 2,517 1.5 1,625
Census Tract 102.02 2,516 3.9 651
Census Tract 2.02 2,451 1.1 2,235
Census Tract 8 2,442 0.2 11,893
Census Tract 108.01 2,429 0.2 14,997
Census Tract 180.01 2,419 10.7 226
Census Tract 6 2,344 0.2 12,198
Census Tract 20 2,300 0.2 12,894
Census Tract 17 2,234 0.3 8,479
Census Tract 143.01 2,052 4.9 418
Census Tract 12 2,013 0.3 6,336
Census Tract 185.01 1,974 6.9 287
Census Tract 122.01 1,899 0.7 2,667
Census Tract 240 1,731 30.0 58
Census Tract 220 1,716 26.2 65
Census Tract 195.01 1,702 30.4 56
Census Tract 107 1,671 0.3 5,509

Showing the 100 most populous of 103 — the rest are shown on the map.

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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 →