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Sussex County, NJ Demographics

Sussex County, NJ is the 17th most populous of 21 counties in New Jersey, with 144,232 residents across 518 square miles. That is about 278 people per square mile.

At the 2020 census

Population 144,232
Land area 518 sq mi
Density 278 / sq mi

Data: 2020 Census · American Community Survey 2024

How Sussex 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: Sussex County, NJ

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

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

Census tracts in Sussex County, NJ

Name Population Sq mi Per sq mi
Census Tract 3734 6,599 2.7 2,424
Census Tract 3731 6,331 17.5 362
Census Tract 3715.02 5,100 14.4 355
Census Tract 3717 5,033 7.2 694
Census Tract 3726 4,863 23.4 208
Census Tract 3738 4,401 1.9 2,335
Census Tract 3748 4,285 2.1 2,002
Census Tract 3749 4,120 0.8 5,390
Census Tract 3723 4,112 26.1 158
Census Tract 3747 4,082 1.4 2,835
Census Tract 3739 4,004 26.9 149
Census Tract 3737 3,973 1.5 2,693
Census Tract 3718.01 3,818 20.6 186
Census Tract 3735 3,799 9.0 423
Census Tract 3710 3,792 45.2 84
Census Tract 3711 3,763 33.6 112
Census Tract 3741 3,627 16.0 226
Census Tract 3732 3,625 12.4 292
Census Tract 3746 3,526 1.8 1,918
Census Tract 3713 3,525 12.5 282
Census Tract 3743 3,409 6.3 540
Census Tract 3729 3,282 2.5 1,289
Census Tract 3727 3,266 1.1 2,853
Census Tract 3725 3,262 8.5 383
Census Tract 3740 3,235 17.6 183
Census Tract 3718.02 3,230 12.6 256
Census Tract 3716 3,084 9.8 314
Census Tract 3733 3,045 4.1 736
Census Tract 3714 2,990 10.2 292
Census Tract 3720 2,966 15.2 195
Census Tract 3736 2,792 12.4 225
Census Tract 3715.03 2,626 13.4 197
Census Tract 3744 2,363 7.4 317
Census Tract 3724 2,358 17.9 132
Census Tract 3730 2,258 2.2 1,025
Census Tract 3742 2,256 7.7 293
Census Tract 3712 2,024 0.6 3,413
Census Tract 3719 1,984 65.5 30
Census Tract 3722 1,981 8.4 236
Census Tract 3721 1,927 9.3 206
Census Tract 3745 1,875 6.6 284
Census Tract 3728 1,630 1.8 901

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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 →