Census tract · San Francisco County
Census Tract 121, San Francisco County, California
Census Tract 121, GEOID 06075012100, in San Francisco County, California, entirely within San Francisco. 3,203 residents in the ACS 2020-2024 5-year estimates (±399); the 2020 Census counted 3,455.
Residents, 2020-2024
3,203
±399 (90% margin)
2020 Census count: 3,455
Median household income
$108,000
±$36,079 (90% margin)
San Francisco County: $140,970
Median home value
$693,500
±$381,246 (90% margin)
San Francisco County: $1,394,500
Median gross rent
$1,984
±$262 (90% margin)
San Francisco County: $2,476
Where is Census Tract 121?
Census Tract 121 is one of 244 census tracts in San Francisco County, California. It covers 0.05 square miles of land, 71,979 residents per square mile in 2020. Its GEOID, 06075012100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| San Francisco | 100% |
6 census tracts border Census Tract 121: Tract 117 ($51,464), Tract 119.01 ($96,518), Tract 119.02 ($75,625), Tract 120.01 ($80,300), Tract 120.02 ($72,549) and Tract 123.02 ($44,954). 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 121?
The 2020-2024 American Community Survey puts Census Tract 121's population at 3,203 (±399) in 1,984 households; the 2020 Census counted 3,455 residents and 2,480 housing units.
| Measure | Tract 121 | San Francisco |
|---|---|---|
| Total population | 3,203±399 | 830,235 |
| Households | 1,984±305 | 363,970 |
| Average household size | 1.41±0.11 | 2.21 |
| Housing units | 2,553±329 | 414,602 |
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 121?
The median resident of Census Tract 121 is 36.4 years old. The largest group is non-Hispanic white residents at 42.1%, then non-Hispanic Asian residents at 27.2%. 35.2% of residents were born outside the United States.
| Measure | Tract 121 | San Francisco |
|---|---|---|
| Median age | 36.4±3.9 | 40.0 |
| Under 18 years | 1.6%±1.4 pts | 13.7% |
| 65 years and over | 11.1%±5.4 pts | 17.6% |
| Hispanic or Latino (any race) | 20.9%±8.2 pts | 16.2% |
| White alone, not Hispanic | 42.1%±8.7 pts | 36.8% |
| Black or African American alone, not Hispanic | 1.4%±0.9 pts | 4.7% |
| Asian alone, not Hispanic | 27.2%±8.6 pts | 34.9% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.3 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.3 pts | 0.3% |
| Two or more races, not Hispanic | 8.3%±4.2 pts | 6.1% |
| Some other race alone, not Hispanic | 0.2%±0.3 pts | 0.8% |
| Born outside the United States | 35.2%±8.1 pts | 34.0% |
| Speak a language other than English at home (age 5+) | 50.0%±9.1 pts | 43.6% |
| Civilian veterans (age 18+) | 1.4%±1.5 pts | 2.5% |
| With a disability | 16.1%±4.8 pts | 11.9% |
| No health insurance coverage | 2.2%±2.1 pts | 3.3% |
| High school graduate or higher (age 25+) | 91.0%±7.7 pts | 89.0% |
| Bachelor's degree or higher (age 25+) | 65.8%±9.5 pts | 60.3% |
| Graduate or professional degree (age 25+) | 24.5%±9.1 pts | 25.4% |
| Lived in the same house a year earlier | 59.1%±10.2 pts | 84.3% |
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 121 earn?
Half of the 1,984 households in Census Tract 121 earn less than $108,000 a year (±$36,079), against $140,970 across San Francisco County: 169th highest of the county's 227 tracts with a reliable estimate. 18.5% of residents live below the poverty line.
| Measure | Tract 121 | San Francisco |
|---|---|---|
| Median household income | $108,000±$36,079 | $140,970 |
| Mean household income | $127,466±$27,758 | $206,854 |
| Per capita income | $80,058±$18,916 | $92,289 |
| People below the poverty line | 18.5%±8.4 pts | 11.2% |
| Children under 18 below the poverty line | 0.0%±59.9 pts | 9.0% |
| Households receiving SNAP | 9.8%±6.3 pts | 11.4% |
| Households with a computer | 99.1%±1.4 pts | 96.6% |
| Households with a broadband subscription | 98.4%±1.7 pts | 93.0% |
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 121?
The median owner-occupied home is valued at $693,500 by its owner (±$381,246). The median renter pays $1,984 a month including utilities, and 29.4% of renters pay 35% or more of their income on rent.
| Measure | Tract 121 | San Francisco |
|---|---|---|
| Median home value (owner-occupied) | $693,500±$381,246 | $1,394,500 |
| Median gross rent | $1,984±$262 | $2,476 |
| Renters paying 35% or more of income on rent | 29.4%±10.9 pts | 31.7% |
| Median monthly owner costs, with a mortgage | $3,308±$573 | $4,000 or more |
| Owner-occupied homes | 9.7%±7.5 pts | 38.2% |
| Renter-occupied homes | 90.3%±7.5 pts | 61.8% |
| Housing units | 2,553±329 | 414,602 |
| Single-family detached homes | 0.0%±1.6 pts | 18.0% |
| Mobile homes | 0.0%±1.6 pts | 0.1% |
| Built 2020 or later | 0.0%±1.6 pts | 1.1% |
| Built 2010 to 2019 | 2.6%±2.6 pts | 6.9% |
| Built 1939 or earlier | 67.9%±9.4 pts | 45.2% |
| Households with no vehicle | 69.3%±13.8 pts | 30.2% |
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 121 get to work?
The average trip to work takes 24.6 minutes. The unemployment rate in 2020-2024 averaged 5.9%.
| Measure | Tract 121 | San Francisco |
|---|---|---|
| In the labor force (age 16+) | 75.2%±6.9 pts | 69.6% |
| Unemployment rate | 5.9%±3.7 pts | 6.1% |
| Drove alone to work | 10.0%±11.0 pts | 28.6% |
| Carpooled | 0.9%±1.4 pts | 5.9% |
| Public transportation | 19.7%±7.8 pts | 18.7% |
| Walked | 41.3%±9.7 pts | 9.4% |
| Worked from home | 18.9%±6.8 pts | 31.0% |
| Mean travel time to work | 24.6 min±2.8 | 30.4 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 121 compare with the other tracts in San Francisco County?
Among San Francisco County's tracts with a reliable estimate, Census Tract 121 ranks as shown below (1 = highest).
| Measure | In San Francisco County | In San Francisco |
|---|---|---|
| Population | 135th of 241 | 135th of 241 |
| Residents per square mile | 22nd of 242 | 22nd of 242 |
| Median household income | 169th of 227 | 169th of 227 |
| Per capita income | 140th of 240 | 140th of 240 |
| Median home value | 209th of 213 | 209th of 213 |
| Median gross rent | 186th of 230 | 186th of 230 |
| Poverty rate | 44th of 180 | 44th of 180 |
| Bachelor's degree or higher | 115th of 237 | 115th of 237 |
| Median age | 180th of 241 | 180th of 241 |
The tracts next to it on San Francisco County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 124.05 | 166th | $113,665±$36,690 · within the margin of this tract |
| Tract 477.02 | 167th | $112,500±$27,837 · within the margin of this tract |
| Tract 302.01 | 168th | $109,659±$29,006 · within the margin of this tract |
| Tract 121 | 169th | $108,000±$36,079 |
| Tract 9803 | 170th | $107,188±$43,473 · within the margin of this tract |
| Tract 228.02 | 171st | $107,083±$42,545 · within the margin of this tract |
| Tract 479.04 | 172nd | $105,577±$47,058 · 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 121?
2 of the 18 figures for Census Tract 121 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