All counties →

Middlesex County, MA Demographics

Middlesex County, MA is the most populous of 14 counties in Massachusetts, with 1,631,987 residents across 818 square miles. That is about 1,995 people per square mile.

At the 2020 census

Population 1,631,987
Land area 818 sq mi
Density 1,995 / 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, MA

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

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

Census tracts in Middlesex County, MA

Name Population Sq mi Per sq mi
Census Tract 3143.01 9,287 5.9 1,574
Census Tract 3152 8,693 5.9 1,479
Census Tract 3684 8,606 1.3 6,561
Census Tract 3163 8,441 4.0 2,105
Census Tract 3183 8,327 9.2 905
Census Tract 3564 8,136 1.3 6,477
Census Tract 3651 7,918 11.8 673
Census Tract 3593.03 7,839 7.9 989
Census Tract 3215 7,791 2.8 2,780
Census Tract 3343 7,768 3.8 2,047
Census Tract 3155 7,754 3.2 2,441
Census Tract 3331 7,687 2.7 2,804
Census Tract 3216 7,615 2.5 3,033
Census Tract 3313 7,477 5.0 1,500
Census Tract 3141.02 7,448 2.5 3,037
Census Tract 3882 7,431 15.8 470
Census Tract 3211 7,218 5.9 1,228
Census Tract 3164 7,097 4.8 1,477
Census Tract 3418 7,075 0.5 12,980
Census Tract 3311.02 7,073 5.2 1,353
Census Tract 3565 7,067 0.9 8,098
Census Tract 3336.02 7,049 1.7 4,203
Census Tract 3603 7,014 13.9 504
Census Tract 3341 6,999 1.7 4,110
Census Tract 3672 6,990 10.0 700
Census Tract 3412 6,988 0.4 16,404
Census Tract 3363 6,985 1.5 4,522
Census Tract 3416 6,985 0.6 11,876
Census Tract 3171.01 6,966 3.8 1,816
Census Tract 3323 6,955 2.0 3,484
Census Tract 3212 6,923 1.8 3,901
Census Tract 3419.03 6,888 0.5 12,814
Census Tract 3181 6,825 6.1 1,127
Census Tract 3701.01 6,807 0.5 12,421
Census Tract 3261.02 6,804 18.9 361
Census Tract 3141.01 6,785 3.1 2,174
Census Tract 3594 6,754 0.2 30,325
Census Tract 3414 6,747 0.3 21,927
Census Tract 3165 6,714 5.2 1,297
Census Tract 3401 6,698 0.8 8,627
Census Tract 3103 6,689 0.4 16,072
Census Tract 3344 6,681 3.5 1,890
Census Tract 3322.02 6,640 2.2 3,032
Census Tract 3832 6,591 0.9 7,086
Census Tract 3114 6,550 0.8 7,918
Census Tract 3591 6,544 5.7 1,142
Census Tract 3102 6,537 0.7 8,868
Census Tract 3334 6,524 1.9 3,460
Census Tract 3613 6,506 13.1 497
Census Tract 3131.01 6,440 11.1 579
Census Tract 3883 6,405 0.3 23,942
Census Tract 3201.06 6,392 6.9 929
Census Tract 3583 6,380 2.9 2,188
Census Tract 3106.02 6,358 0.9 7,267
Census Tract 3838 6,356 2.0 3,125
Census Tract 3836 6,341 2.4 2,660
Census Tract 3586 6,319 3.4 1,879
Census Tract 3223 6,281 1.9 3,231
Census Tract 3567.01 6,275 0.4 14,305
Census Tract 3422.01 6,274 0.2 31,350
Census Tract 3352 6,273 1.3 4,904
Census Tract 3612 6,259 3.8 1,659
Census Tract 3631.04 6,259 5.9 1,064
Census Tract 3351 6,259 1.6 3,913
Census Tract 3531.02 6,238 0.4 16,423
Census Tract 3735 6,237 1.3 4,775
Census Tract 3872.01 6,231 5.0 1,244
Census Tract 3106.01 6,194 1.9 3,183
Census Tract 3688 6,169 0.7 9,476
Census Tract 3384 6,167 2.4 2,618
Census Tract 3161.02 6,152 3.7 1,653
Census Tract 3539 6,139 0.1 49,197
Census Tract 3736 6,132 1.2 5,280
Census Tract 3373 6,130 1.6 3,944
Census Tract 3738 6,066 1.0 6,143
Census Tract 3321 6,063 2.3 2,635
Census Tract 3689.01 5,973 1.5 3,883
Census Tract 3173.02 5,955 2.7 2,185
Census Tract 3744 5,955 1.6 3,621
Census Tract 3652.01 5,949 5.7 1,038
Census Tract 3131.02 5,940 5.7 1,047
Census Tract 3823 5,917 5.0 1,176
Census Tract 3504 5,901 0.2 25,443
Census Tract 3385 5,859 1.6 3,764
Census Tract 3686 5,856 0.4 13,735
Census Tract 3681.01 5,782 0.9 6,489
Census Tract 3683 5,763 0.7 8,670
Census Tract 3361 5,758 0.8 7,284
Census Tract 3151 5,740 5.7 1,003
Census Tract 3611 5,726 7.4 778
Census Tract 3392 5,700 1.0 5,653
Census Tract 3840.03 5,699 2.9 1,978
Census Tract 3825 5,664 1.9 3,030
Census Tract 3395 5,662 0.5 12,229
Census Tract 3641.01 5,631 1.9 2,891
Census Tract 3142 5,629 2.9 1,963
Census Tract 3116 5,625 1.4 4,139
Census Tract 3549.02 5,616 0.2 23,111
Census Tract 3587 5,608 2.7 2,066
Census Tract 3417 5,607 0.4 13,224

Showing the 100 most populous of 357 — the rest are shown on the map.

Related places

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 →