Census tract · San Diego County
Census Tract 31.09, San Diego County, California
Census Tract 31.09, GEOID 06073003109, in San Diego County, California, entirely within San Diego. 3,256 residents in the ACS 2020-2024 5-year estimates (±643); the 2020 Census counted 3,037.
Residents, 2020-2024
3,256
±643 (90% margin)
2020 Census count: 3,037
Median household income
$128,313
±$5,799 (90% margin)
San Diego County: $106,268
Median home value
$637,400
±$40,199 (90% margin)
San Diego County: $854,700
Median gross rent
$2,726
±$334 (90% margin)
San Diego County: $2,246
Where is Census Tract 31.09?
Census Tract 31.09 is one of 737 census tracts in San Diego County, California. It covers 0.42 square miles of land, 7,197 residents per square mile in 2020. Its GEOID, 06073003109, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| San Diego | 100% |
6 census tracts border Census Tract 31.09: Tract 31.13 ($122,533), Tract 31.14 ($113,267), Tract 31.15 ($101,813), Tract 32.01 ($83,169), Tract 32.08 ($99,464) and Tract 119.02 ($82,551). 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 31.09?
The 2020-2024 American Community Survey puts Census Tract 31.09's population at 3,256 (±643) in 886 households; the 2020 Census counted 3,037 residents and 822 housing units.
| Measure | Tract 31.09 | San Diego |
|---|---|---|
| Total population | 3,256±643 | 1,389,526 |
| Households | 886±141 | 530,412 |
| Average household size | 3.54±0.28 | 2.52 |
| Housing units | 908±138 | 568,668 |
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 31.09?
The median resident of Census Tract 31.09 is 50.5 years old; 15.8% are under 18 and 32.6% are 65 or older. The largest group is non-Hispanic Asian residents at 63.4%, then Hispanic or Latino residents (of any race) at 20.8%. 52.1% of residents were born outside the United States.
| Measure | Tract 31.09 | San Diego |
|---|---|---|
| Median age | 50.5±10.0 | 36.2 |
| Under 18 years | 15.8%±4.9 pts | 18.4% |
| 65 years and over | 32.6%±7.0 pts | 14.6% |
| Hispanic or Latino (any race) | 20.8%±13.7 pts | 29.8% |
| White alone, not Hispanic | 5.4%±2.8 pts | 40.9% |
| Black or African American alone, not Hispanic | 5.3%±4.7 pts | 5.3% |
| Asian alone, not Hispanic | 63.4%±12.6 pts | 17.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.2%±0.3 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.3 pts | 0.4% |
| Two or more races, not Hispanic | 3.8%±2.5 pts | 5.5% |
| Some other race alone, not Hispanic | 1.1%±1.6 pts | 0.7% |
| Born outside the United States | 52.1%±9.8 pts | 25.1% |
| Speak a language other than English at home (age 5+) | 69.0%±6.0 pts | 39.0% |
| Civilian veterans (age 18+) | 13.8%±3.7 pts | 6.4% |
| With a disability | 21.1%±4.4 pts | 10.5% |
| No health insurance coverage | 4.2%±2.8 pts | 5.8% |
| High school graduate or higher (age 25+) | 88.3%±4.0 pts | 90.2% |
| Bachelor's degree or higher (age 25+) | 27.1%±5.6 pts | 51.0% |
| Graduate or professional degree (age 25+) | 3.7%±2.0 pts | 21.7% |
| Lived in the same house a year earlier | 92.3%±4.5 pts | 85.0% |
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 31.09 earn?
Half of the 886 households in Census Tract 31.09 earn less than $128,313 a year (±$5,799), against $106,268 across San Diego County: 242nd highest of the county's 725 tracts with a reliable estimate. 7.6% of residents live below the poverty line.
| Measure | Tract 31.09 | San Diego |
|---|---|---|
| Median household income | $128,313±$5,799 | $108,077 |
| Mean household income | $133,040±$10,381 | $144,973 |
| Per capita income | $37,276±$3,510 | $57,083 |
| People below the poverty line | 7.6%±3.9 pts | 11.0% |
| Children under 18 below the poverty line | 2.7%±3.2 pts | 12.1% |
| Households receiving SNAP | 4.6%±3.1 pts | 9.6% |
| Households with a computer | 99.1%±1.3 pts | 97.7% |
| Households with a broadband subscription | 96.4%±2.9 pts | 95.2% |
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 31.09?
Owners occupy 89.7% of Census Tract 31.09's occupied homes and renters 10.3%. The median owner-occupied home is valued at $637,400 by its owner (±$40,199). The median renter pays $2,726 a month including utilities.
| Measure | Tract 31.09 | San Diego |
|---|---|---|
| Median home value (owner-occupied) | $637,400±$40,199 | $906,700 |
| Median gross rent | $2,726±$334 | $2,313 |
| Renters paying 35% or more of income on rent | 39.3%±29.8 pts | 44.7% |
| Median monthly owner costs, with a mortgage | $2,603±$606 | $3,252 |
| Owner-occupied homes | 89.7%±5.2 pts | 47.3% |
| Renter-occupied homes | 10.3%±5.2 pts | 52.7% |
| Housing units | 908±138 | 568,668 |
| Single-family detached homes | 86.6%±11.8 pts | 43.1% |
| Mobile homes | 7.9%±11.7 pts | 1.1% |
| Built 2020 or later | 0.0%±4.6 pts | 1.5% |
| Built 2010 to 2019 | 0.0%±4.6 pts | 7.6% |
| Built 1939 or earlier | 0.0%±4.6 pts | 6.4% |
| Households with no vehicle | 1.8%±2.2 pts | 6.6% |
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 31.09 get to work?
64.2% of Census Tract 31.09's workers drive alone and 10.8% work from home. The average trip to work takes 27.0 minutes.
| Measure | Tract 31.09 | San Diego |
|---|---|---|
| In the labor force (age 16+) | 54.4%±5.7 pts | 68.1% |
| Unemployment rate | 2.3%±1.7 pts | 6.0% |
| Drove alone to work | 64.2%±8.8 pts | 62.6% |
| Carpooled | 20.7%±7.8 pts | 7.7% |
| Public transportation | 4.3%±4.7 pts | 2.7% |
| Walked | 0.0%±2.9 pts | 3.4% |
| Worked from home | 10.8%±5.4 pts | 21.2% |
| Mean travel time to work | 27.0 min±4.2 | 23.5 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 31.09 compare with the other tracts in San Diego County?
Among San Diego County's tracts with a reliable estimate, Census Tract 31.09 ranks as shown below (1 = highest).
| Measure | In San Diego County | In San Diego |
|---|---|---|
| Population | 556th of 735 | 245th of 327 |
| Residents per square mile | 313th of 736 | 179th of 328 |
| Median household income | 242nd of 725 | 112th of 319 |
| Per capita income | 531st of 734 | 243rd of 326 |
| Median home value | 555th of 703 | 247th of 308 |
| Median gross rent | 220th of 703 | 108th of 314 |
| Poverty rate | 317th of 472 | 148th of 213 |
| Bachelor's degree or higher | 534th of 732 | 255th of 325 |
| Median age | 45th of 735 | 15th of 327 |
| Owner-occupied share | 59th of 708 | 13th of 306 |
The tracts next to it on San Diego County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 54.03 | 239th | $129,185±$28,411 · within the margin of this tract |
| Tract 166.06 | 240th | $128,750±$17,612 · within the margin of this tract |
| Tract 97.04 | 241st | $128,491±$21,210 · within the margin of this tract |
| Tract 31.09 | 242nd | $128,313±$5,799 |
| Tract 169.02 | 242nd | $128,313±$22,703 · within the margin of this tract |
| Tract 208.07 | 244th | $128,177±$30,698 · within the margin of this tract |
| Tract 133.24 | 245th | $127,716±$23,471 · 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 31.09?
2 of the 18 figures for Census Tract 31.09 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