Middlesex County, NJ Demographics
Middlesex County, NJ is the 3rd most populous of 21 counties in New Jersey, with 863,162 residents across 309 square miles. That is about 2,791 people per square mile.
At the 2020 census
| Population | 863,162 |
|---|---|
| Land area | 309 sq mi |
| Density | 2,791 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Middlesex 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: Middlesex County, NJ
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Middlesex County, NJ — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Middlesex County, NJ
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 82.14 | 10,076 | 8.7 | 1,153 |
| Census Tract 36.01 | 8,156 | 0.5 | 16,078 |
| Census Tract 84.03 | 7,969 | 3.2 | 2,464 |
| Census Tract 70 | 7,892 | 1.4 | 5,455 |
| Census Tract 3 | 7,637 | 1.1 | 7,190 |
| Census Tract 85.04 | 7,460 | 5.4 | 1,371 |
| Census Tract 25 | 7,379 | 0.9 | 7,863 |
| Census Tract 65 | 7,351 | 2.0 | 3,676 |
| Census Tract 51 | 7,337 | 0.6 | 11,649 |
| Census Tract 62.05 | 7,332 | 1.5 | 4,960 |
| Census Tract 15.04 | 7,324 | 1.4 | 5,236 |
| Census Tract 62.07 | 7,294 | 1.6 | 4,702 |
| Census Tract 56.02 | 7,282 | 0.3 | 27,185 |
| Census Tract 62.08 | 7,190 | 1.9 | 3,815 |
| Census Tract 66.04 | 7,107 | 3.3 | 2,185 |
| Census Tract 27.03 | 7,097 | 0.8 | 8,677 |
| Census Tract 63 | 7,037 | 1.6 | 4,529 |
| Census Tract 77.02 | 6,994 | 10.8 | 650 |
| Census Tract 2 | 6,945 | 1.7 | 4,173 |
| Census Tract 26.04 | 6,894 | 1.2 | 5,630 |
| Census Tract 30.02 | 6,755 | 1.6 | 4,326 |
| Census Tract 80.01 | 6,635 | 2.9 | 2,250 |
| Census Tract 4.03 | 6,555 | 0.9 | 7,606 |
| Census Tract 15.06 | 6,515 | 1.4 | 4,692 |
| Census Tract 46 | 6,347 | 0.3 | 22,341 |
| Census Tract 48 | 6,300 | 0.7 | 9,462 |
| Census Tract 14.14 | 6,173 | 1.2 | 5,042 |
| Census Tract 82.11 | 6,157 | 3.1 | 1,987 |
| Census Tract 76 | 6,137 | 0.7 | 9,099 |
| Census Tract 86.04 | 6,106 | 3.2 | 1,889 |
| Census Tract 94 | 6,054 | 2.3 | 2,611 |
| Census Tract 4.04 | 6,031 | 0.9 | 6,428 |
| Census Tract 38.01 | 6,002 | 0.5 | 11,951 |
| Census Tract 33 | 5,991 | 1.6 | 3,798 |
| Census Tract 67.03 | 5,979 | 1.4 | 4,391 |
| Census Tract 18.05 | 5,931 | 1.6 | 3,759 |
| Census Tract 14.18 | 5,921 | 0.7 | 8,738 |
| Census Tract 58 | 5,884 | 0.2 | 29,339 |
| Census Tract 7.02 | 5,863 | 3.0 | 1,927 |
| Census Tract 61.01 | 5,851 | 1.3 | 4,595 |
| Census Tract 15.02 | 5,826 | 1.4 | 4,116 |
| Census Tract 10.03 | 5,784 | 3.3 | 1,756 |
| Census Tract 83 | 5,783 | 0.9 | 6,554 |
| Census Tract 14.13 | 5,765 | 1.3 | 4,402 |
| Census Tract 27.01 | 5,705 | 0.8 | 7,184 |
| Census Tract 85.02 | 5,669 | 21.1 | 268 |
| Census Tract 52 | 5,656 | 0.2 | 26,726 |
| Census Tract 71.03 | 5,639 | 3.4 | 1,638 |
| Census Tract 57 | 5,625 | 0.3 | 20,147 |
| Census Tract 93 | 5,622 | 0.4 | 14,371 |
| Census Tract 82.13 | 5,609 | 12.5 | 448 |
| Census Tract 14.15 | 5,608 | 2.1 | 2,704 |
| Census Tract 24.01 | 5,607 | 1.1 | 5,313 |
| Census Tract 78.04 | 5,489 | 2.0 | 2,697 |
| Census Tract 79.08 | 5,457 | 1.0 | 5,462 |
| Census Tract 26.03 | 5,453 | 0.7 | 7,429 |
| Census Tract 49 | 5,451 | 0.2 | 24,084 |
| Census Tract 12 | 5,445 | 0.5 | 10,876 |
| Census Tract 50 | 5,436 | 0.3 | 20,194 |
| Census Tract 61.03 | 5,423 | 1.1 | 4,937 |
| Census Tract 86.01 | 5,423 | 4.7 | 1,164 |
| Census Tract 11 | 5,408 | 0.8 | 6,953 |
| Census Tract 6.10 | 5,403 | 1.0 | 5,175 |
| Census Tract 88.01 | 5,364 | 2.4 | 2,241 |
| Census Tract 71.02 | 5,286 | 0.8 | 6,261 |
| Census Tract 5.01 | 5,273 | 1.0 | 5,464 |
| Census Tract 85.05 | 5,246 | 2.0 | 2,632 |
| Census Tract 17.01 | 5,237 | 1.5 | 3,593 |
| Census Tract 90 | 5,134 | 2.2 | 2,330 |
| Census Tract 60.02 | 5,130 | 0.9 | 5,980 |
| Census Tract 16 | 5,123 | 0.5 | 9,333 |
| Census Tract 84.05 | 5,106 | 1.9 | 2,650 |
| Census Tract 85.01 | 5,106 | 3.6 | 1,425 |
| Census Tract 19.01 | 5,071 | 1.1 | 4,608 |
| Census Tract 86.02 | 5,065 | 3.1 | 1,656 |
| Census Tract 72.03 | 4,988 | 0.8 | 5,976 |
| Census Tract 74.02 | 4,956 | 1.6 | 3,005 |
| Census Tract 31.02 | 4,938 | 0.6 | 8,364 |
| Census Tract 82.04 | 4,897 | 2.0 | 2,389 |
| Census Tract 20 | 4,842 | 1.0 | 4,795 |
| Census Tract 5.04 | 4,690 | 0.3 | 13,930 |
| Census Tract 86.06 | 4,684 | 0.4 | 12,344 |
| Census Tract 44 | 4,665 | 0.2 | 25,576 |
| Census Tract 68 | 4,661 | 1.0 | 4,824 |
| Census Tract 72.02 | 4,640 | 1.0 | 4,432 |
| Census Tract 9.02 | 4,618 | 1.0 | 4,619 |
| Census Tract 81.01 | 4,608 | 1.5 | 3,072 |
| Census Tract 9802 | 4,592 | 0.8 | 5,653 |
| Census Tract 1.02 | 4,559 | 1.1 | 4,016 |
| Census Tract 32.03 | 4,527 | 0.7 | 6,931 |
| Census Tract 78.05 | 4,444 | 0.7 | 6,103 |
| Census Tract 14.10 | 4,429 | 0.8 | 5,766 |
| Census Tract 92 | 4,400 | 3.6 | 1,211 |
| Census Tract 30.01 | 4,395 | 0.7 | 6,308 |
| Census Tract 82.12 | 4,334 | 6.2 | 703 |
| Census Tract 61.04 | 4,277 | 1.2 | 3,664 |
| Census Tract 84.04 | 4,274 | 1.5 | 2,835 |
| Census Tract 40 | 4,269 | 0.8 | 5,304 |
| Census Tract 45.01 | 4,235 | 0.2 | 21,842 |
| Census Tract 13 | 4,219 | 0.5 | 7,775 |
Showing the 100 most populous of 192 — 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.