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San Diego County, CA Demographics

San Diego County, CA is the 2nd most populous of 58 counties in California, with 3,298,016 residents across 4,210 square miles. That is about 783 people per square mile.

At the 2020 census

Population 3,298,016
Land area 4,210 sq mi
Density 783 / sq mi

Data: 2020 Census · American Community Survey 2024

How San Diego 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: San Diego County, CA

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

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

Census tracts in San Diego County, CA

Name Population Sq mi Per sq mi
Census Tract 187 37,892 211.7 179
Census Tract 133.17 16,159 6.7 2,424
Census Tract 83.05 14,126 1.7 8,207
Census Tract 215.02 9,851 4.1 2,384
Census Tract 170.65 9,344 1.8 5,175
Census Tract 29.04 8,957 0.7 12,870
Census Tract 203.10 8,703 2.2 3,963
Census Tract 200.44 8,509 3.3 2,593
Census Tract 133.21 8,312 0.7 11,089
Census Tract 83.28 8,213 2.8 2,983
Census Tract 94 8,035 24.1 333
Census Tract 193.03 8,025 3.2 2,476
Census Tract 133.18 7,876 0.6 12,517
Census Tract 170.64 7,844 0.7 10,850
Census Tract 201.10 7,812 18.0 433
Census Tract 168.04 7,727 1.6 4,850
Census Tract 168.07 7,707 2.0 3,784
Census Tract 117 7,569 0.6 12,021
Census Tract 85.07 7,520 0.9 8,706
Census Tract 97.06 7,520 2.2 3,380
Census Tract 101.10 7,510 0.8 8,898
Census Tract 133.16 7,461 1.0 7,228
Census Tract 133.19 7,458 3.0 2,521
Census Tract 134.14 7,375 1.1 6,658
Census Tract 198.11 7,330 3.8 1,929
Census Tract 131.02 7,294 0.8 9,508
Census Tract 165.02 7,271 0.8 8,955
Census Tract 213.02 7,237 145.8 50
Census Tract 169.01 7,217 16.4 440
Census Tract 95.04 7,198 22.8 316
Census Tract 200.30 7,193 2.3 3,139
Census Tract 27.03 7,181 0.8 9,482
Census Tract 167.04 7,174 1.8 3,968
Census Tract 165.04 7,171 0.5 14,207
Census Tract 83.80 7,165 0.9 7,615
Census Tract 142 7,130 0.9 8,124
Census Tract 83.66 7,113 2.3 3,053
Census Tract 166.07 7,111 1.5 4,638
Census Tract 100.05 7,060 0.6 12,147
Census Tract 191.03 7,046 24.3 290
Census Tract 212.05 7,029 3.8 1,833
Census Tract 221.02 7,024 2.4 2,964
Census Tract 197.01 7,022 1.2 6,019
Census Tract 38 7,014 0.7 10,080
Census Tract 178.01 7,000 1.7 4,172
Census Tract 202.02 6,955 0.4 15,943
Census Tract 85.09 6,949 0.8 9,216
Census Tract 32.08 6,944 0.5 13,218
Census Tract 191.05 6,920 17.5 395
Census Tract 202.11 6,918 0.6 11,257
Census Tract 170.39 6,915 1.8 3,741
Census Tract 85.10 6,912 0.8 8,821
Census Tract 132.06 6,909 0.6 11,261
Census Tract 85.03 6,869 1.4 4,835
Census Tract 133.09 6,866 1.0 7,037
Census Tract 199.04 6,865 1.6 4,243
Census Tract 200.35 6,858 1.3 5,225
Census Tract 83.58 6,856 0.7 9,421
Census Tract 200.29 6,854 2.1 3,252
Census Tract 171.09 6,845 1.7 4,015
Census Tract 178.11 6,806 1.3 5,303
Census Tract 185.04 6,797 2.4 2,808
Census Tract 189.05 6,764 1.1 6,190
Census Tract 83.24 6,745 2.1 3,191
Census Tract 200.19 6,728 1.3 5,126
Census Tract 100.18 6,718 1.3 5,090
Census Tract 200.31 6,659 1.7 3,856
Census Tract 207.06 6,656 6.4 1,033
Census Tract 193.01 6,651 1.4 4,894
Census Tract 203.04 6,641 5.4 1,239
Census Tract 118.02 6,636 0.4 18,041
Census Tract 170.48 6,627 1.5 4,538
Census Tract 196.01 6,622 1.4 4,885
Census Tract 83.47 6,598 0.9 7,538
Census Tract 98.02 6,586 0.8 8,586
Census Tract 83.68 6,580 1.0 6,449
Census Tract 101.07 6,578 0.9 7,323
Census Tract 95.05 6,559 6.8 970
Census Tract 133.20 6,556 2.4 2,687
Census Tract 31.15 6,554 0.6 11,074
Census Tract 29.02 6,540 0.6 10,785
Census Tract 86 6,535 1.0 6,337
Census Tract 100.09 6,517 1.4 4,799
Census Tract 157.01 6,503 0.4 17,520
Census Tract 194.03 6,489 1.2 5,206
Census Tract 200.43 6,475 1.4 4,664
Census Tract 192.05 6,472 0.8 8,615
Census Tract 132.03 6,471 0.4 15,019
Census Tract 133.23 6,428 0.8 8,416
Census Tract 198.10 6,412 3.8 1,671
Census Tract 190.01 6,395 63.7 100
Census Tract 170.70 6,376 1.0 6,361
Census Tract 156.01 6,340 0.6 10,117
Census Tract 189.04 6,316 1.1 5,626
Census Tract 189.06 6,298 1.7 3,651
Census Tract 96.03 6,293 0.7 9,418
Census Tract 186.09 6,286 0.5 12,372
Census Tract 34.01 6,259 1.1 5,779
Census Tract 136.04 6,256 1.4 4,504
Census Tract 101.03 6,248 1.3 4,844

Showing the 100 most populous of 736 — the rest are shown on the map.

Related places

Metro areas containing San Diego County

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 →