Census tract · St. Louis County
Census Tract 2101.01, St. Louis County, Missouri
Census Tract 2101.01, GEOID 29189210101, in St. Louis County, Missouri, mostly within Spanish Lake (67% of its census blocks). 1,287 residents in the ACS 2020-2024 5-year estimates (±204); the 2020 Census counted 1,400.
Residents, 2020-2024
1,287
±204 (90% margin)
2020 Census count: 1,400
Median household income
$74,306
±$23,806 (90% margin)
St. Louis County: $82,936
Median home value
$209,200
±$36,040 (90% margin)
St. Louis County: $276,800
Median gross rent
$1,392
±$55 (90% margin)
St. Louis County: $1,209
Where is Census Tract 2101.01?
Census Tract 2101.01 is one of 236 census tracts in St. Louis County, Missouri. It covers 13.02 square miles of land, 108 residents per square mile in 2020. Its GEOID, 29189210101, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Spanish Lake | 67% |
5 census tracts border Census Tract 2101.01: Tract 3101 in St. Charles County ($94,130), Tract 2101.02, Tract 2107.03 ($64,185), Tract 2109.12 ($89,471) and Tract 1270 in St. Louis city ($38,342). 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 2101.01?
The 2020-2024 American Community Survey puts Census Tract 2101.01's population at 1,287 (±204) in 436 households; the 2020 Census counted 1,400 residents and 610 housing units.
| Measure | Tract 2101.01 | Spanish Lake |
|---|---|---|
| Total population | 1,287±204 | 17,873 |
| Households | 436±87 | 7,215 |
| Average household size | 2.62±0.44 | 2.45 |
| Housing units | 577±171 | 8,939 |
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 2101.01?
The median resident of Census Tract 2101.01 is 31.5 years old; 38.9% are under 18 and 11.5% are 65 or older. The largest group is non-Hispanic Black residents at 53.5%, then non-Hispanic white residents at 40.3%.
| Measure | Tract 2101.01 | Spanish Lake |
|---|---|---|
| Median age | 31.5±4.4 | 33.0 |
| Under 18 years | 38.9%±6.7 pts | 26.9% |
| 65 years and over | 11.5%±5.9 pts | 11.9% |
| Hispanic or Latino (any race) | 3.7%±6.6 pts | 1.2% |
| White alone, not Hispanic | 40.3%±8.5 pts | 14.1% |
| Black or African American alone, not Hispanic | 53.5%±8.2 pts | 80.3% |
| Asian alone, not Hispanic | 1.6%±2.7 pts | 0.6% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±2.7 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±2.7 pts | 0.0% |
| Two or more races, not Hispanic | 0.9%±1.3 pts | 3.3% |
| Some other race alone, not Hispanic | 0.0%±2.7 pts | 0.4% |
| Born outside the United States | 2.2%±2.9 pts | 1.9% |
| Speak a language other than English at home (age 5+) | 5.2%±6.4 pts | 2.3% |
| Civilian veterans (age 18+) | 14.6%±5.3 pts | 6.2% |
| With a disability | 3.8%±2.5 pts | 16.8% |
| No health insurance coverage | 7.5%±4.6 pts | 13.3% |
| High school graduate or higher (age 25+) | 87.4%±8.5 pts | 89.6% |
| Bachelor's degree or higher (age 25+) | 42.8%±11.5 pts | 14.3% |
| Graduate or professional degree (age 25+) | 20.9%±13.9 pts | 5.4% |
| Lived in the same house a year earlier | 80.3%±7.5 pts | 86.6% |
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 2101.01 earn?
Half of the 436 households in Census Tract 2101.01 earn less than $74,306 a year (±$23,806), against $82,936 across St. Louis County: 135th highest of the county's 234 tracts with a reliable estimate. 17.8% of residents live below the poverty line.
| Measure | Tract 2101.01 | Spanish Lake |
|---|---|---|
| Median household income | $74,306±$23,806 | $55,920 |
| Mean household income | $107,421±$32,561 | $70,453 |
| Per capita income | $37,254±$10,343 | $29,313 |
| People below the poverty line | 17.8%±10.3 pts | 14.8% |
| Children under 18 below the poverty line | 36.0%±22.8 pts | 20.8% |
| Households receiving SNAP | 25.9%±8.6 pts | 25.7% |
| Households with a computer | 92.2%±9.2 pts | 96.0% |
| Households with a broadband subscription | 91.1%±9.2 pts | 92.6% |
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 2101.01?
Owners occupy 77.1% of Census Tract 2101.01's occupied homes and renters 22.9%. The median owner-occupied home is valued at $209,200 by its owner (±$36,040). The median renter pays $1,392 a month including utilities.
| Measure | Tract 2101.01 | Spanish Lake |
|---|---|---|
| Median home value (owner-occupied) | $209,200±$36,040 | $135,600 |
| Median gross rent | $1,392±$55 | $1,160 |
| Renters paying 35% or more of income on rent | 34.4%±39.9 pts | 46.0% |
| Median monthly owner costs, with a mortgage | $1,682±$165 | $1,349 |
| Owner-occupied homes | 77.1%±12.5 pts | 49.2% |
| Renter-occupied homes | 22.9%±12.5 pts | 50.8% |
| Housing units | 577±171 | 8,939 |
| Single-family detached homes | 80.8%±22.1 pts | 63.8% |
| Mobile homes | 0.0%±5.9 pts | 0.0% |
| Built 2020 or later | 0.0%±5.9 pts | 0.0% |
| Built 2010 to 2019 | 0.0%±5.9 pts | 0.8% |
| Built 1939 or earlier | 12.7%±8.6 pts | 5.6% |
| Households with no vehicle | 8.3%±7.6 pts | 9.9% |
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 2101.01 get to work?
55.4% of Census Tract 2101.01's workers drive alone and 32.7% work from home. The average trip to work takes 22.4 minutes.
| Measure | Tract 2101.01 | Spanish Lake |
|---|---|---|
| In the labor force (age 16+) | 61.3%±9.3 pts | 69.0% |
| Unemployment rate | 8.4%±12.6 pts | 7.2% |
| Drove alone to work | 55.4%±16.4 pts | 75.2% |
| Carpooled | 11.0%±8.5 pts | 11.3% |
| Public transportation | 0.0%±6.7 pts | 0.2% |
| Walked | 1.0%±1.9 pts | 1.8% |
| Worked from home | 32.7%±18.9 pts | 9.8% |
| Mean travel time to work | 22.4 min±2.3 | 24.6 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 2101.01 compare with the other tracts in St. Louis County?
Among St. Louis County's tracts with a reliable estimate, Census Tract 2101.01 ranks as shown below (1 = highest).
| Measure | In St. Louis County | In Spanish Lake |
|---|---|---|
| Population | 231st of 236 | 5th of 5 |
| Residents per square mile | 235th of 236 | 5th of 5 |
| Median household income | 135th of 234 | 1st of 4 |
| Per capita income | 157th of 236 | 1st of 5 |
| Median home value | 148th of 233 | 1st of 4 |
| Median gross rent | 70th of 210 | 1st of 5 |
| Poverty rate | 41st of 146 | 2nd of 5 |
| Bachelor's degree or higher | 126th of 227 | 1st of 4 |
| Median age | 219th of 234 | 3rd of 5 |
| Owner-occupied share | 90th of 236 | 1st of 5 |
The tracts next to it on St. Louis County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 2131.02 | 132nd | $75,268±$12,747 · within the margin of this tract |
| Tract 2200.02 | 133rd | $74,831±$19,358 · within the margin of this tract |
| Tract 2108.05 | 134th | $74,702±$22,842 · within the margin of this tract |
| Tract 2101.01 | 135th | $74,306±$23,806 |
| Tract 2207.01 | 136th | $74,257±$16,619 · within the margin of this tract |
| Tract 2204.47 | 137th | $73,993±$13,368 · within the margin of this tract |
| Tract 2109.21 | 138th | $73,925±$11,053 · 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 2101.01?
2 of the 18 figures for Census Tract 2101.01 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