City · Texas
San Diego, Texas
San Diego, city, mostly in Duval County (79.9% of its 2020 residents), with a part in Jim Wells County, Texas. San Diego had 3,503 residents on July 1, 2025 by the Census Bureau's estimate, down 6.4% since 2020; the 2020 Census counted 3,748 and the ACS 2020-2024 5-year estimates put it at 3,675 (±436). GEOID 4865180.
Residents, July 2025 estimate
3,503
Census Bureau estimate (no margin published)
2020 Census count: 3,748 · ACS 2020-2024: 3,675 ±436
Median household income
$53,174
±$11,520 (90% margin)
Texas: $78,476
Median home value
$85,600
±$34,787 (90% margin)
Texas: $283,800
Median gross rent
$1,096
±$582 (90% margin)
Texas: $1,403
Where is San Diego and what county is it in?
San Diego is a city mostly in Duval County (79.9% of its 2020 residents), with a part in Jim Wells County, Texas. It covers 1.9 square miles of land, 1,972 residents per square mile in 2020.
| County | 2020 residents | Share |
|---|---|---|
| Duval County | 2,995 | 79.9% |
| Jim Wells County | 753 | 20.1% |
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in San Diego, and is it growing?
The Census Bureau estimates that 3,503 people lived in San Diego on July 1, 2025, down 6.4% since 2020, while Texas grew 8.8%. The 2020 Census counted 3,748 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 3,675 (±436).
| Measure | San Diego | Duval County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,675 ±436 | 9,742 | no clear change |
| Households | 1,253 ±230 | 3,053 | no clear change |
| Average household size | 2.91 ±0.45 | 2.99 | no clear change |
| Housing units | 1,736 ±275 | 4,420 | no clear change |
San Diego's population since 2000
From 4,753 in 2000 to 3,503 in 2025: down 26.3%. The 2000, 2010 and 2020 figures are census counts, each for San Diego as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in San Diego?
The median resident of San Diego is 29.8 years old; 36.1% are under 18 and 13.3% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 91.1%, then non-Hispanic white residents at 8.8%.
| Measure | San Diego | Duval County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 29.8 ±8.9 | 33.6 | no clear change |
| Under 18 years | 36.1% ±7.0 pts | 25.2% | – |
| 65 years and over | 13.3% ±3.7 pts | 17.0% | – |
| Male | 42.4% ±7.1 pts | 52.5% | – |
| Hispanic or Latino (any race) | 91.1% ±5.8 pts | 81.6% | no clear change |
| White alone, not Hispanic | 8.8% ±5.8 pts | 15.6% | – |
| Black or African American alone, not Hispanic | 0.1% ±0.7 pts | 0.7% | – |
| Asian alone, not Hispanic | 0.0% ±1.3 pts | 1.2% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.3 pts | 0.0% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 0.0% ±1.3 pts | 0.8% | – |
| Some other race alone, not Hispanic | 0.0% ±1.3 pts | 0.0% | – |
| Born outside the United States | 3.1% ±2.7 pts | 3.1% | – |
| Speak a language other than English at home (age 5+) | 50.2% ±7.9 pts | 51.1% | – |
| Civilian veterans (age 18+) | 4.0% ±3.4 pts | 5.1% | – |
| With a disability | 18.0% ±7.0 pts | 22.2% | – |
| No health insurance coverage | 18.9% ±9.1 pts | 22.2% | no clear change |
| High school graduate or higher (age 25+) | 78.7% ±9.8 pts | 76.5% | – |
| Bachelor's degree or higher (age 25+) | 12.1% ±7.9 pts | 6.8% | no clear change |
| Graduate or professional degree (age 25+) | 1.1% ±1.3 pts | 2.3% | – |
| Lived in the same house a year earlier | 88.0% ±8.9 pts | 89.9% | – |
| Moved from another state in the past year | 5.1% ±7.3 pts | 0.1% | – |
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 San Diego earn?
Half of San Diego's 1,253 households earn less than $53,174 a year (±$11,520), against $49,038 in Duval County and $78,476 in Texas. In 2015-2019 the median was $31,369 in 2024 dollars, so it rose by $21,805 after inflation. 34.0% of residents live below the poverty line.
| Measure | San Diego | Duval County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $53,174 ±$11,520 | $49,038 | +$21,805 |
| Mean household income | $57,532 ±$10,144 | $61,129 | – |
| Per capita income | $21,740 ±$4,464 | $22,146 | no clear change |
| People below the poverty line | 34.0% ±13.8 pts | 33.3% | no clear change |
| Children under 18 below the poverty line | 55.7% ±26.1 pts | 54.3% | no clear change |
| Households receiving SNAP | 23.5% ±11.4 pts | 24.9% | – |
| Households with a computer | 75.3% ±11.7 pts | 79.4% | – |
| Households with a broadband subscription | 66.6% ±12.8 pts | 68.9% | – |
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 San Diego?
Owners occupy 71.5% of San Diego's occupied homes and renters 28.5%. The median owner-occupied home is valued at $85,600 by its owner (±$34,787). The median renter pays $1,096 a month including utilities.
| Measure | San Diego | Duval County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $85,600 ±$34,787 | $89,400 | +$40,557 |
| Median gross rent | $1,096 ±$582 | $741 | no clear change |
| Renters paying 35% or more of income on rent | 26.1% ±29.5 pts | 29.2% | – |
| Median monthly owner costs, with a mortgage | $1,212 ±$960 | $1,162 | – |
| Owner-occupied homes | 71.5% ±13.6 pts | 70.4% | no clear change |
| Renter-occupied homes | 28.5% ±13.6 pts | 29.6% | – |
| Housing units | 1,736 ±275 | 4,420 | no clear change |
| Homeowner vacancy rate | 0.0% ±5.4 pts | 0.4% | – |
| Rental vacancy rate | 17.2% ±14.6 pts | 2.5% | – |
| Single-family detached homes | 81.7% ±6.9 pts | 83.0% | – |
| Mobile homes | 9.1% ±5.8 pts | 12.9% | – |
| Built 2020 or later | 0.5% ±0.9 pts | 0.8% | – |
| Built 2010 to 2019 | 0.6% ±1.1 pts | 2.1% | – |
| Built 1939 or earlier | 5.8% ±3.8 pts | 5.5% | – |
| Households with no vehicle | 10.5% ±6.3 pts | 10.8% | – |
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 San Diego work and get to work?
79.2% of San Diego's workers drive alone. The average trip to work takes 32.1 minutes. The unemployment rate in 2020-2024 averaged 10.8%.
| Measure | San Diego | Duval County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 60.1% ±9.7 pts | 47.5% | – |
| Unemployment rate | 10.8% ±6.7 pts | 11.0% | – |
| Drove alone to work | 79.2% ±11.4 pts | 79.5% | – |
| Carpooled | 6.1% ±5.5 pts | 7.7% | – |
| Public transportation | 0.0% ±3.9 pts | 0.0% | – |
| Walked | 0.0% ±3.9 pts | 1.1% | – |
| Worked from home | 10.3% ±8.9 pts | 8.4% | – |
| Mean travel time to work | 32.1 min ±11.1 | 29.8 min | no clear change |
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 census tracts are in San Diego?
1 census tract lies mostly in San Diego, and 2 more reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9501Duval County | 5,022 | $37,489 |
| Tract 9502.01Jim Wells County | 3,988 | $40,234 |
| Tract 9502.02Jim Wells County | 4,147 | $65,590 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in San Diego) · Census block assignment files
How does San Diego compare with other places in Texas?
By the Census Bureau's July 2025 estimates, San Diego is the 5,867th-most populous of the 19,476 U.S. incorporated places that have one and the 462nd-most populous of 1,224 in Texas.
San Diego ranks 704th of 933 places in Texas with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 462nd | 1,224 |
| Growth 2020-2025 (PEP) | 758th | 784 |
| Residents per square mile | 204th | 979 |
| Median household income | 704th | 933 |
| Per capita income | 855th | 978 |
| Median home value | 866th | 950 |
| Median gross rent | 445th | 852 |
| Poverty rate | 36th | 716 |
| Bachelor's degree or higher | 745th | 877 |
| Median age | 879th | 973 |
| Owner-occupied share | 484th | 973 |
| Travel time to work | 196th | 976 |
San Diego's figures with every place in Texas (CSV)
Every place in Texas, sortable · Compare San Diego with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for San Diego?
21 of the 57 figures for San Diego 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.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for San Diego are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in San Diego.