PlainCities

Census tracts · San Marcos, CA

Census tracts in San Marcos, California

18 census tracts lie mostly within San Marcos, and 9 more reach into it, by the 2020 census blocks they share. Median household income runs from $59,559 in Tract 200.28 to $237,188 in Tract 200.43, against $109,377 for San Marcos as a whole (ACS 2020-2024 5-year estimates).

Which census tracts of San Marcos earn the most and the least?

The five tracts with the highest and the lowest median household income among those mostly within San Marcos and with a reliable estimate.

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

Every census tract in San Marcos

Sort by any column; the share column is how much of each tract's land (by 2020 census blocks) lies inside San Marcos.

Census tracts in or partly in San Marcos, ACS 2020-2024 5-year estimates. Distance and direction from the Census Bureau's internal point of San Marcos (2024 Gazetteer), which is not always its downtown
Tract 200.21060730200211.4 mi northSan Diego County5,534±586$79,604$860,400$1,741100%
Tract 200.23060730200231.6 mi northeastSan Diego County3,942±409$97,031$683,300$2,091100%
Tract 200.25060730200252.4 mi eastSan Diego County5,250±572$82,796$674,100$2,355100%
Tract 200.28060730200280.6 mi northSan Diego County3,571±339$59,559$566,500$1,881100%
Tract 200.29060730200291.2 mi westSan Diego County7,007±785$77,449not published$2,288100%
Tract 200.39060730200392.3 mi northwestSan Diego County1,959±281$156,833$880,100$3,500 or more100%
Tract 200.40060730200402.4 mi northeastSan Diego County4,333±563$164,345$1,031,300$3,020100%
Tract 200.41060730200411.7 mi northeastSan Diego County3,150±351$85,855$751,400$2,236100%
Tract 203.10060730203101.0 mi eastSan Diego County9,019±1,183$111,270$788,700$2,87395%
Tract 200.24060730200242.8 mi eastSan Diego County4,220±529$99,254$664,500$2,73394%
Tract 200.37060730200372.4 mi northwestSan Diego County4,415±974$107,034$767,900$2,41394%
Tract 200.43060730200432.2 mi southwestSan Diego County5,378±574$237,188$1,369,500$2,38193%
Tract 200.36060730200362.5 mi northwestSan Diego County3,567±582$73,024$405,700$2,19390%
Tract 200.44060730200441.2 mi southwestSan Diego County9,056±1,504$213,196$1,124,400$1,75483%
Tract 200.38060730200382.4 mi northSan Diego County5,685±919$151,650$956,300$3,500 or more81%
Tract 200.19060730200192.8 mi westSan Diego County7,253±1,138$89,875$680,300$1,81080%
Tract 200.26060730200261.1 mi westSan Diego County4,447±397$135,238$896,500$2,97457%
Tract 200.42060730200422.9 mi southwestSan Diego County4,759±1,581$110,313$789,400$2,39256%
Tract 171.13060730171134.2 mi southwestSan Diego County5,175±1,115$132,431$1,421,400$2,81046%
Tract 203.11060730203112.3 mi southeastSan Diego County4,151±521$130,764$1,008,000$3,500 or more20%
Tract 200.31060730200314.0 mi westSan Diego County6,519±1,513$116,982$1,098,100$2,69219%
Tract 171.12060730171124.1 mi southSan Diego County2,319±284$250,000 or more$1,628,200not published18%
Tract 203.04060730203043.7 mi northeastSan Diego County6,153±727$144,653$787,600$2,77118%
Tract 203.09060730203093.5 mi eastSan Diego County4,528±610$113,359$671,600$2,15115%
Tract 199.03060730199033.5 mi northwestSan Diego County4,961±759$110,068$914,300$2,29315%
Tract 192.08060730192086.1 mi northSan Diego County3,627±653$107,375$1,043,400$3,0424%
Tract 200.32060730200326.2 mi southwestSan Diego County3,230±342$183,368$1,250,000$2,4313%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files · Census block assignment files

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections