Census tract · San Diego County
Census Tract 200.42, San Diego County, California
Census Tract 200.42, GEOID 06073020042, in San Diego County, California, mostly within San Marcos (56% of its census blocks). 4,759 residents in the ACS 2020-2024 5-year estimates (±1,581); the 2020 Census counted 3,794.
Residents, 2020-2024
4,759
±1,581 (90% margin)
2020 Census count: 3,794
Median household income
$110,313
±$19,266 (90% margin)
San Diego County: $106,268
Median home value
$789,400
±$118,636 (90% margin)
San Diego County: $854,700
Median gross rent
$2,392
±$649 (90% margin)
San Diego County: $2,246
Where is Census Tract 200.42?
Census Tract 200.42 is one of 737 census tracts in San Diego County, California. It covers 1.37 square miles of land, 2,767 residents per square mile in 2020. Its GEOID, 06073020042, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| San Marcos | 56% |
| Lake San Marcos | 37% |
| Carlsbad | 7% |
7 census tracts border Census Tract 200.42: Tract 171.13 ($132,431), Tract 200.15 ($184,063), Tract 200.19 ($89,875), Tract 200.26 ($135,238), Tract 200.31 ($116,982), Tract 200.32 ($183,368) and Tract 200.44 ($213,196). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 200.42?
The 2020-2024 American Community Survey puts Census Tract 200.42's population at 4,759 (±1,581) in 1,774 households; the 2020 Census counted 3,794 residents and 1,755 housing units.
| Measure | Tract 200.42 | San Marcos |
|---|---|---|
| Total population | 4,759±1,581 | 94,882 |
| Households | 1,774±376 | 31,350 |
| Average household size | 2.59±0.42 | 2.96 |
| Housing units | 1,833±373 | 32,557 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 200.42?
The median resident of Census Tract 200.42 is 41.4 years old; 26.3% are under 18 and 26.2% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 45.1%, then non-Hispanic white residents at 44.1%. 13.4% of residents were born outside the United States.
| Measure | Tract 200.42 | San Marcos |
|---|---|---|
| Median age | 41.4±6.0 | 36.8 |
| Under 18 years | 26.3%±7.8 pts | 25.2% |
| 65 years and over | 26.2%±9.6 pts | 13.2% |
| Hispanic or Latino (any race) | 45.1%±20.9 pts | 36.8% |
| White alone, not Hispanic | 44.1%±16.6 pts | 43.8% |
| Black or African American alone, not Hispanic | 0.4%±0.5 pts | 1.2% |
| Asian alone, not Hispanic | 6.2%±4.9 pts | 11.7% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.9 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.9 pts | 0.1% |
| Two or more races, not Hispanic | 3.3%±2.6 pts | 5.9% |
| Some other race alone, not Hispanic | 0.9%±1.4 pts | 0.4% |
| Born outside the United States | 13.4%±7.8 pts | 22.3% |
| Speak a language other than English at home (age 5+) | 37.3%±21.9 pts | 35.2% |
| Civilian veterans (age 18+) | 9.6%±4.3 pts | 5.8% |
| With a disability | 10.7%±4.8 pts | 10.8% |
| No health insurance coverage | 2.8%±2.8 pts | 7.1% |
| High school graduate or higher (age 25+) | 94.5%±5.3 pts | 88.2% |
| Bachelor's degree or higher (age 25+) | 48.1%±6.4 pts | 43.8% |
| Graduate or professional degree (age 25+) | 13.9%±6.1 pts | 15.5% |
| Lived in the same house a year earlier | 86.6%±10.6 pts | 87.8% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 200.42 earn?
Half of the 1,774 households in Census Tract 200.42 earn less than $110,313 a year (±$19,266), against $106,268 across San Diego County: 361st highest of the county's 725 tracts with a reliable estimate. 4.8% of residents live below the poverty line.
| Measure | Tract 200.42 | San Marcos |
|---|---|---|
| Median household income | $110,313±$19,266 | $109,377 |
| Mean household income | $129,202±$16,477 | $141,381 |
| Per capita income | $49,304±$8,460 | $47,841 |
| People below the poverty line | 4.8%±3.0 pts | 9.2% |
| Children under 18 below the poverty line | 4.3%±5.4 pts | 7.6% |
| Households receiving SNAP | 7.3%±7.4 pts | 7.9% |
| Households with a computer | 99.2%±1.0 pts | 98.5% |
| Households with a broadband subscription | 94.4%±3.4 pts | 95.9% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 200.42?
Owners occupy 71.7% of Census Tract 200.42's occupied homes and renters 28.3%. The median owner-occupied home is valued at $789,400 by its owner (±$118,636). The median renter pays $2,392 a month including utilities, and 51.5% of renters pay 35% or more of their income on rent.
| Measure | Tract 200.42 | San Marcos |
|---|---|---|
| Median home value (owner-occupied) | $789,400±$118,636 | $868,000 |
| Median gross rent | $2,392±$649 | $2,348 |
| Renters paying 35% or more of income on rent | 51.5%±20.1 pts | 52.7% |
| Median monthly owner costs, with a mortgage | $3,178±$146 | $3,357 |
| Owner-occupied homes | 71.7%±9.8 pts | 63.7% |
| Renter-occupied homes | 28.3%±9.8 pts | 36.3% |
| Housing units | 1,833±373 | 32,557 |
| Single-family detached homes | 25.9%±8.6 pts | 52.1% |
| Mobile homes | 0.0%±2.3 pts | 10.1% |
| Built 2020 or later | 0.0%±2.3 pts | 2.5% |
| Built 2010 to 2019 | 32.7%±15.0 pts | 12.1% |
| Built 1939 or earlier | 0.0%±2.3 pts | 0.5% |
| Households with no vehicle | 5.4%±3.0 pts | 3.5% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 200.42 get to work?
50.9% of Census Tract 200.42's workers drive alone and 39.2% work from home. The average trip to work takes 21.9 minutes.
| Measure | Tract 200.42 | San Marcos |
|---|---|---|
| In the labor force (age 16+) | 47.4%±6.8 pts | 66.2% |
| Unemployment rate | 1.7%±2.1 pts | 4.6% |
| Drove alone to work | 50.9%±15.1 pts | 67.7% |
| Carpooled | 4.3%±4.2 pts | 8.0% |
| Public transportation | 0.0%±2.5 pts | 0.5% |
| Walked | 2.9%±4.3 pts | 1.5% |
| Worked from home | 39.2%±17.3 pts | 20.5% |
| Mean travel time to work | 21.9 min±5.0 | 26.5 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 200.42 compare with the other tracts in San Diego County?
Among San Diego County's tracts with a reliable estimate, Census Tract 200.42 ranks as shown below (1 = highest).
| Measure | In San Diego County | In San Marcos |
|---|---|---|
| Population | 280th of 735 | 11th of 20 |
| Residents per square mile | 586th of 736 | 15th of 20 |
| Median household income | 361st of 725 | 9th of 20 |
| Per capita income | 384th of 734 | 8th of 20 |
| Median home value | 378th of 703 | 10th of 19 |
| Median gross rent | 338th of 703 | 9th of 19 |
| Poverty rate | 424th of 472 | 11th of 13 |
| Bachelor's degree or higher | 310th of 732 | 6th of 20 |
| Median age | 235th of 735 | 5th of 20 |
| Owner-occupied share | 250th of 708 | 9th of 20 |
The tracts next to it on San Diego County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 216 | 358th | $111,076±$16,891 · within the margin of this tract |
| Tract 66 | 359th | $110,651±$16,806 · within the margin of this tract |
| Tract 83.76 | 360th | $110,625±$19,461 · within the margin of this tract |
| Tract 185.16 | 361st | $110,313±$26,556 · within the margin of this tract |
| Tract 200.42 | 361st | $110,313±$19,266 |
| Tract 191.08 | 363rd | $110,114±$31,978 · within the margin of this tract |
| Tract 199.03 | 364th | $110,068±$15,678 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 200.42?
2 of the 18 figures for Census Tract 200.42 on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections