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St. Lucie County, FL Demographics

St. Lucie County, FL is the 20th most populous of 67 counties in Florida, with 329,226 residents across 572 square miles. That is about 576 people per square mile.

At the 2020 census

Population 329,226
Land area 572 sq mi
Density 576 / sq mi

Data: 2020 Census · American Community Survey 2024

How St. Lucie 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: St. Lucie County, FL

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

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

Census tracts in St. Lucie County, FL

Name Population Sq mi Per sq mi
Census Tract 3821.26 12,651 28.3 447
Census Tract 3821.12 9,392 3.3 2,873
Census Tract 3807 8,960 5.4 1,664
Census Tract 3821.29 8,565 2.3 3,704
Census Tract 3820.08 8,250 2.5 3,338
Census Tract 3821.17 8,201 2.0 4,117
Census Tract 3821.19 8,112 2.0 4,049
Census Tract 3821.15 7,699 2.6 2,965
Census Tract 3821.10 7,557 2.6 2,943
Census Tract 3820.14 7,408 2.3 3,196
Census Tract 3815.05 7,237 2.0 3,535
Census Tract 3814.02 7,023 10.3 679
Census Tract 3816.03 6,991 7.7 904
Census Tract 3804 6,919 1.8 3,936
Census Tract 3821.14 6,548 2.3 2,905
Census Tract 3805 6,543 2.2 3,006
Census Tract 3818.03 6,412 3.6 1,774
Census Tract 3819 6,412 4.7 1,377
Census Tract 3821.16 6,244 2.0 3,062
Census Tract 3820.16 6,242 8.1 774
Census Tract 3820.12 6,172 1.4 4,330
Census Tract 3803 6,171 1.3 4,853
Census Tract 3818.04 6,156 2.0 3,021
Census Tract 3821.22 5,569 3.9 1,435
Census Tract 3821.18 5,500 2.2 2,499
Census Tract 3809.02 5,423 4.4 1,236
Census Tract 3814.01 5,248 3.5 1,498
Census Tract 3820.07 5,233 1.6 3,238
Census Tract 3821.28 5,188 1.6 3,155
Census Tract 3821.27 5,126 5.7 892
Census Tract 3815.07 5,106 4.9 1,047
Census Tract 3821.23 4,915 2.0 2,405
Census Tract 3818.02 4,757 1.4 3,431
Census Tract 3820.09 4,659 1.7 2,787
Census Tract 3813 4,428 3.8 1,160
Census Tract 3816.05 4,372 2.3 1,884
Census Tract 3822.02 4,219 240.3 18
Census Tract 3821.21 4,096 1.9 2,130
Census Tract 3806 4,035 0.8 5,118
Census Tract 3821.30 4,017 0.9 4,244
Census Tract 3816.02 3,872 3.8 1,031
Census Tract 3820.15 3,786 1.3 2,943
Census Tract 3815.06 3,696 1.6 2,265
Census Tract 3815.08 3,689 2.0 1,812
Census Tract 3815.04 3,606 1.0 3,474
Census Tract 3812.04 3,599 5.6 640
Census Tract 3822.01 3,559 123.9 29
Census Tract 3821.24 3,507 1.8 1,902
Census Tract 3821.20 3,498 1.6 2,124
Census Tract 3802 3,446 0.7 4,647
Census Tract 3808 3,352 11.7 286
Census Tract 3811.03 3,266 1.2 2,710
Census Tract 3821.25 3,265 1.1 3,048
Census Tract 3820.13 3,238 0.8 3,840
Census Tract 3811.07 3,204 4.0 808
Census Tract 3817.01 2,693 1.3 2,043
Census Tract 3820.11 2,529 1.0 2,604
Census Tract 3809.01 2,459 1.4 1,788
Census Tract 3811.05 2,345 1.7 1,346
Census Tract 3817.02 2,295 3.0 768
Census Tract 3820.10 2,095 1.9 1,104
Census Tract 3811.04 2,027 0.8 2,663
Census Tract 3811.06 1,829 1.9 958
Census Tract 3816.04 1,810 0.9 2,065
Census Tract 3810 1,771 6.9 259
Census Tract 3801 1,032 0.9 1,202
Census Tract 9800 2 2.3 1

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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 →