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Somerset County, NJ Demographics

Somerset County, NJ is the 13th most populous of 21 counties in New Jersey, with 345,361 residents across 302 square miles. That is about 1,144 people per square mile.

At the 2020 census

Population 345,361
Land area 302 sq mi
Density 1,144 / sq mi

Data: 2020 Census · American Community Survey 2024

How Somerset 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: Somerset County, NJ

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

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

Census tracts in Somerset County, NJ

Name Population Sq mi Per sq mi
Census Tract 541 7,934 4.8 1,644
Census Tract 532 7,723 1.2 6,359
Census Tract 531.05 7,699 2.0 3,776
Census Tract 510 7,319 4.4 1,681
Census Tract 534.02 7,290 12.7 574
Census Tract 521 7,281 4.4 1,652
Census Tract 542.01 7,173 8.2 876
Census Tract 537.05 7,135 1.2 5,729
Census Tract 538.07 6,878 5.2 1,330
Census Tract 507.04 6,793 1.9 3,650
Census Tract 534.06 6,678 3.9 1,733
Census Tract 539.05 6,629 3.4 1,975
Census Tract 538.05 6,468 6.5 990
Census Tract 523 6,449 6.0 1,072
Census Tract 536.02 6,386 10.5 606
Census Tract 542.02 6,266 16.5 381
Census Tract 533 6,101 0.9 6,679
Census Tract 535.01 6,058 7.3 830
Census Tract 526.05 5,935 2.3 2,575
Census Tract 543.02 5,803 2.7 2,179
Census Tract 522.01 5,704 7.6 755
Census Tract 524 5,417 6.0 896
Census Tract 509.03 5,395 5.5 980
Census Tract 522.03 5,271 5.5 953
Census Tract 517 5,246 0.3 15,090
Census Tract 512 5,218 0.6 8,267
Census Tract 531.03 4,995 1.6 3,197
Census Tract 522.04 4,948 6.5 763
Census Tract 520.02 4,883 0.5 10,839
Census Tract 537.06 4,864 4.8 1,022
Census Tract 530 4,863 0.6 7,543
Census Tract 534.03 4,860 0.8 5,912
Census Tract 507.03 4,836 2.1 2,274
Census Tract 509.01 4,819 3.7 1,297
Census Tract 536.03 4,804 4.4 1,098
Census Tract 538.04 4,803 3.9 1,232
Census Tract 508.02 4,760 3.5 1,376
Census Tract 511 4,530 0.4 12,361
Census Tract 518 4,433 0.6 7,375
Census Tract 526.03 4,411 2.8 1,574
Census Tract 514 4,356 1.1 4,019
Census Tract 506 4,297 1.5 2,784
Census Tract 527.01 4,276 9.2 465
Census Tract 519 4,232 0.8 5,206
Census Tract 507.01 4,156 2.1 1,984
Census Tract 526.04 4,133 8.2 502
Census Tract 534.05 4,129 9.7 426
Census Tract 508.01 4,024 3.3 1,203
Census Tract 520.01 4,014 0.6 6,742
Census Tract 537.03 3,886 20.6 189
Census Tract 509.02 3,875 5.4 714
Census Tract 537.07 3,875 5.9 652
Census Tract 536.04 3,750 5.2 726
Census Tract 539.04 3,622 4.3 841
Census Tract 527.02 3,617 3.6 995
Census Tract 531.02 3,571 0.6 5,670
Census Tract 505 3,538 0.4 7,886
Census Tract 529.05 3,493 0.9 4,037
Census Tract 543.01 3,457 2.8 1,250
Census Tract 515 3,418 0.3 10,013
Census Tract 503 3,400 0.6 5,461
Census Tract 504 3,200 0.8 3,808
Census Tract 516 3,179 0.9 3,397
Census Tract 501 3,032 0.5 5,886
Census Tract 537.04 2,900 1.9 1,498
Census Tract 502 2,714 0.4 7,546
Census Tract 528 2,558 5.7 446
Census Tract 529.06 2,504 0.6 4,374
Census Tract 538.06 2,467 4.6 542
Census Tract 529.04 2,275 24.7 92
Census Tract 513 2,240 0.7 3,375
Census Tract 529.01 924 4.8 191
Census Tract 539.01 743 0.6 1,219
Census Tract 538.01 448 0.7 658

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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 →