Census tract · San Juan Municipio
Census Tract 21, San Juan Municipio, Puerto Rico
Census Tract 21, GEOID 72127002100, in San Juan Municipio, Puerto Rico, entirely within San Juan zona urbana. 802 residents in the ACS 2020-2024 5-year estimates (±262); the 2020 Census counted 1,257.
Residents, 2020-2024
802
±262 (90% margin)
2020 Census count: 1,257
Median household income
$26,604
±$3,544 (90% margin)
San Juan Municipio: $27,992
Median home value
$232,600
±$57,530 (90% margin)
San Juan Municipio: $171,200
Median gross rent
$635
±$114 (90% margin)
San Juan Municipio: $611
Where is Census Tract 21?
Census Tract 21 is one of 138 census tracts in San Juan Municipio, Puerto Rico. It covers 0.19 square miles of land, 6,616 residents per square mile in 2020. Its GEOID, 72127002100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| San Juan zona urbana | 100% |
6 census tracts border Census Tract 21: Tract 18 ($47,143), Tract 19 ($67,216), Tract 20.02 ($28,750), Tract 22 ($25,917), Tract 39.02 ($18,380) and Tract 42 ($25,234). 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 21?
The 2020-2024 American Community Survey puts Census Tract 21's population at 802 (±262) in – households; the 2020 Census counted 1,257 residents and 1,144 housing units.
| Measure | Tract 21 | San Juan zona urbana |
|---|---|---|
| Total population | 802±262 | 317,995 |
| Housing units | 1,058±175 | 190,752 |
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 21?
The median resident of Census Tract 21 is 51.9 years old. The largest group is Hispanic or Latino residents (of any race) at 87.4%, then non-Hispanic Black residents at 7.6%.
| Measure | Tract 21 | San Juan zona urbana |
|---|---|---|
| Median age | 51.9±9.0 | 45.7 |
| Under 18 years | 5.4%±4.7 pts | 15.3% |
| 65 years and over | 19.6%±7.3 pts | 25.5% |
| Hispanic or Latino (any race) | 87.4%±11.8 pts | 98.2% |
| White alone, not Hispanic | 2.6%±3.0 pts | 1.2% |
| Black or African American alone, not Hispanic | 7.6%±10.9 pts | 0.2% |
| Asian alone, not Hispanic | 0.0%±6.6 pts | 0.2% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±6.6 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±6.6 pts | 0.0% |
| Two or more races, not Hispanic | 2.4%±4.0 pts | 0.1% |
| Some other race alone, not Hispanic | 0.0%±6.6 pts | 0.2% |
| No health insurance coverage | 8.9%±8.8 pts | 8.5% |
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 21 earn?
Half of the – households in Census Tract 21 earn less than $26,604 a year (±$3,544), against $27,992 across San Juan Municipio: 62nd highest of the county's 120 tracts with a reliable estimate. 44.5% of residents live below the poverty line.
| Measure | Tract 21 | San Juan zona urbana |
|---|---|---|
| Median household income | $26,604±$3,544 | $28,562 |
| Mean household income | $29,369±$7,293 | $54,668 |
| Per capita income | $21,071±$6,996 | $26,372 |
| People below the poverty line | 44.5%±18.5 pts | 38.2% |
| Children under 18 below the poverty line | 79.1%±35.1 pts | 58.6% |
| Households receiving SNAP | 27.2%±12.8 pts | 35.5% |
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 21?
Owners occupy 44.5% of Census Tract 21's occupied homes and renters 55.5%. The median owner-occupied home is valued at $232,600 by its owner (±$57,530). The median renter pays $635 a month including utilities, and 35.5% of renters pay 35% or more of their income on rent.
| Measure | Tract 21 | San Juan zona urbana |
|---|---|---|
| Median home value (owner-occupied) | $232,600±$57,530 | $173,200 |
| Median gross rent | $635±$114 | $612 |
| Renters paying 35% or more of income on rent | 35.5%±21.0 pts | 45.3% |
| Median monthly owner costs, with a mortgage | $1,328±$111 | $1,180 |
| Owner-occupied homes | 44.5%±11.8 pts | 52.5% |
| Renter-occupied homes | 55.5%±11.8 pts | 47.5% |
| Housing units | 1,058±175 | 190,752 |
| Single-family detached homes | 10.6%±4.8 pts | 38.2% |
| Mobile homes | 0.0%±5.1 pts | 0.1% |
| Built 2020 or later | 0.0%±5.1 pts | 0.2% |
| Built 2010 to 2019 | 7.7%±3.9 pts | 1.9% |
| Built 1939 or earlier | 6.4%±4.1 pts | 4.7% |
| Households with no vehicle | 27.6%±13.0 pts | 20.4% |
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 21 get to work?
55.3% of Census Tract 21's workers drive alone. The average trip to work takes 20.5 minutes.
| Measure | Tract 21 | San Juan zona urbana |
|---|---|---|
| In the labor force (age 16+) | 63.7%±12.8 pts | 52.6% |
| Unemployment rate | 7.1%±8.5 pts | 12.2% |
| Drove alone to work | 55.3%±18.5 pts | 73.4% |
| Carpooled | 0.0%±11.3 pts | 7.1% |
| Public transportation | 7.4%±11.0 pts | 3.4% |
| Walked | 33.1%±19.8 pts | 4.4% |
| Worked from home | 0.0%±11.3 pts | 8.3% |
| Mean travel time to work | 20.5 min±2.4 | 24.0 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 21 compare with the other tracts in San Juan Municipio?
Among San Juan Municipio's tracts with a reliable estimate, Census Tract 21 ranks as shown below (1 = highest).
| Measure | In San Juan Municipio | In San Juan zona urbana |
|---|---|---|
| Population | 127th of 127 | 120th of 120 |
| Residents per square mile | 101st of 137 | 94th of 130 |
| Median household income | 62nd of 120 | 62nd of 113 |
| Per capita income | 59th of 126 | 59th of 119 |
| Median home value | 26th of 115 | 26th of 108 |
| Median gross rent | 65th of 119 | 62nd of 112 |
| Poverty rate | 52nd of 121 | 45th of 114 |
| Median age | 22nd of 126 | 22nd of 119 |
| Owner-occupied share | 96th of 121 | 90th of 114 |
The tracts next to it on San Juan Municipio's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 77 | 59th | $27,759±$3,843 · within the margin of this tract |
| Tract 102 | 60th | $27,346±$11,586 · within the margin of this tract |
| Tract 55 | 61st | $26,827±$13,882 · within the margin of this tract |
| Tract 21 | 62nd | $26,604±$3,544 |
| Tract 52.14 | 63rd | $26,307±$2,864 · within the margin of this tract |
| Tract 24 | 64th | $26,250±$9,445 · within the margin of this tract |
| Tract 38 | 64th | $26,250±$8,326 · 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 21?
4 of the 16 figures for Census Tract 21 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