City · Missouri
Black Jack, Missouri
Black Jack, city, in St. Louis County, Missouri. Black Jack had 6,547 residents on July 1, 2025 by the Census Bureau's estimate, down 1.5% since 2020; the 2020 Census counted 6,634 and the ACS 2020-2024 5-year estimates put it at 6,589 (±19). GEOID 2906004.
Residents, July 2025 estimate
6,547
Census Bureau estimate (no margin published)
2020 Census count: 6,634 · ACS 2020-2024: 6,589 ±19
Median household income
$78,331
±$14,662 (90% margin)
Missouri: $70,702
Median home value
$193,000
±$10,757 (90% margin)
Missouri: $230,300
Median gross rent
$1,166
±$217 (90% margin)
Missouri: $1,033
Where is Black Jack and what county is it in?
Black Jack is a city in St. Louis County, Missouri. It covers 2.6 square miles of land, 2,565 residents per square mile in 2020.
Black Jack is in the St. Louis, MO-IL metropolitan statistical area, which takes in 15 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Black Jack, and is it growing?
The Census Bureau estimates that 6,547 people lived in Black Jack on July 1, 2025, down 1.5% since 2020, while Missouri grew 1.9%. The 2020 Census counted 6,634 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 6,589 (±19).
| Measure | Black Jack | St. Louis County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 6,589 ±19 | 995,569 | −343 |
| Households | 2,683 ±290 | 413,849 | no clear change |
| Average household size | 2.36 ±0.25 | 2.36 | no clear change |
| Housing units | 3,054 ±365 | 446,192 | +513 |
Black Jack's population since 2000
From 6,792 in 2000 to 6,547 in 2025: down 3.6%. The 2000, 2010 and 2020 figures are census counts, each for Black Jack 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 Black Jack?
The median resident of Black Jack is 42.7 years old; 24.5% are under 18 and 23.3% are 65 or older. The largest group is non-Hispanic Black residents at 88.7%, then non-Hispanic white residents at 9.0%.
| Measure | Black Jack | St. Louis County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 42.7 ±7.2 | 40.3 | +10.2 |
| Under 18 years | 24.5% ±8.0 pts | 22.0% | – |
| 65 years and over | 23.3% ±6.2 pts | 19.1% | – |
| Male | 46.0% ±6.2 pts | 47.8% | – |
| Hispanic or Latino (any race) | 0.0% ±0.5 pts | 3.9% | – |
| White alone, not Hispanic | 9.0% ±3.3 pts | 61.4% | −7.8 pts |
| Black or African American alone, not Hispanic | 88.7% ±4.7 pts | 24.0% | +7.8 pts |
| Asian alone, not Hispanic | 0.2% ±0.4 pts | 4.9% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.2 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.5 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.0% ±2.0 pts | 5.3% | – |
| Some other race alone, not Hispanic | 0.0% ±0.5 pts | 0.5% | – |
| Born outside the United States | 1.0% ±1.1 pts | 8.4% | – |
| Speak a language other than English at home (age 5+) | 1.0% ±1.6 pts | 10.5% | – |
| Civilian veterans (age 18+) | 12.1% ±4.5 pts | 6.0% | – |
| With a disability | 14.1% ±5.0 pts | 12.1% | – |
| No health insurance coverage | 2.4% ±2.1 pts | 5.7% | – |
| High school graduate or higher (age 25+) | 92.9% ±3.9 pts | 94.5% | – |
| Bachelor's degree or higher (age 25+) | 32.2% ±8.3 pts | 47.4% | +11.5 pts |
| Graduate or professional degree (age 25+) | 16.7% ±5.9 pts | 20.4% | – |
| Lived in the same house a year earlier | 94.9% ±2.5 pts | 88.2% | – |
| Moved from another state in the past year | 0.1% ±0.2 pts | 2.0% | – |
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 Black Jack earn?
Half of Black Jack's 2,683 households earn less than $78,331 a year (±$14,662), against $82,936 in St. Louis County and $70,702 in Missouri. In 2015-2019 it was $71,416 in 2024 dollars; the margins of error cannot tell the two periods apart.
| Measure | Black Jack | St. Louis County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $78,331 ±$14,662 | $82,936 | no clear change |
| Mean household income | $89,498 ±$12,871 | $123,036 | – |
| Per capita income | $36,486 ±$5,162 | $51,977 | +$6,793 |
| People below the poverty line | 5.0% ±3.3 pts | 9.8% | – |
| Children under 18 below the poverty line | 3.7% ±5.7 pts | 13.5% | – |
| Households receiving SNAP | 10.1% ±6.8 pts | 8.0% | – |
| Households with a computer | 98.3% ±2.1 pts | 96.3% | – |
| Households with a broadband subscription | 97.8% ±2.8 pts | 93.4% | – |
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 Black Jack?
Owners occupy 78.1% of Black Jack's occupied homes and renters 21.9%. The median owner-occupied home is valued at $193,000 by its owner (±$10,757). The median renter pays $1,166 a month including utilities, and 49.2% of renters pay 35% or more of their income on rent.
| Measure | Black Jack | St. Louis County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $193,000 ±$10,757 | $276,800 | +$35,840 |
| Median gross rent | $1,166 ±$217 | $1,209 | no clear change |
| Renters paying 35% or more of income on rent | 49.2% ±25.6 pts | 39.5% | no clear change |
| Median monthly owner costs, with a mortgage | $1,691 ±$68 | $1,753 | – |
| Owner-occupied homes | 78.1% ±7.9 pts | 69.2% | +16.2 pts |
| Renter-occupied homes | 21.9% ±7.9 pts | 30.8% | – |
| Housing units | 3,054 ±365 | 446,192 | +513 |
| Homeowner vacancy rate | 0.0% ±1.7 pts | 0.7% | – |
| Rental vacancy rate | 25.1% ±15.7 pts | 5.0% | – |
| Single-family detached homes | 77.8% ±6.6 pts | 72.0% | – |
| Mobile homes | 0.0% ±1.1 pts | 0.3% | – |
| Built 2020 or later | 0.0% ±1.1 pts | 0.7% | – |
| Built 2010 to 2019 | 0.5% ±0.7 pts | 3.5% | – |
| Built 1939 or earlier | 8.2% ±7.0 pts | 9.7% | – |
| Households with no vehicle | 4.4% ±4.4 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 Black Jack work and get to work?
64.9% of Black Jack's workers drive alone and 25.0% work from home. The average trip to work takes 27.5 minutes.
| Measure | Black Jack | St. Louis County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 61.7% ±7.4 pts | 65.0% | – |
| Unemployment rate | 6.0% ±5.2 pts | 4.3% | – |
| Drove alone to work | 64.9% ±10.6 pts | 71.3% | – |
| Carpooled | 4.8% ±4.2 pts | 6.4% | – |
| Public transportation | 2.0% ±2.0 pts | 1.4% | – |
| Walked | 0.0% ±1.2 pts | 1.4% | – |
| Worked from home | 25.0% ±10.1 pts | 18.3% | – |
| Mean travel time to work | 27.5 min ±4.9 | 23.1 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 Black Jack?
1 census tract lies mostly in Black Jack, and 4 more reach into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 2108.06St. Louis County | 5,555 | $68,838 |
| Tract 2108.08St. Louis County | 3,530 | $97,774 |
| Tract 2108.07St. Louis County | 5,339 | $79,113 |
| Tract 2108.03St. Louis County | 4,593 | $68,000 |
| Tract 2108.05St. Louis County | 6,817 | $74,702 |
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 Black Jack) · Census block assignment files
How does Black Jack compare with other places in Missouri?
By the Census Bureau's July 2025 estimates, Black Jack is the 4,221st-most populous of the 19,476 U.S. incorporated places that have one and the 111th-most populous of 936 in Missouri.
Black Jack ranks 93rd of 416 places in Missouri with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 111th | 936 |
| Growth 2020-2025 (PEP) | 294th | 394 |
| Residents per square mile | 53rd | 420 |
| Median household income | 93rd | 416 |
| Per capita income | 108th | 420 |
| Median home value | 141st | 416 |
| Median gross rent | 71st | 398 |
| Bachelor's degree or higher | 95th | 404 |
| Median age | 86th | 420 |
| Owner-occupied share | 91st | 418 |
| Work from home | 13th | 270 |
| Travel time to work | 87th | 420 |
Black Jack's figures with every place in Missouri (CSV)
Every place in Missouri, sortable · Compare Black Jack 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 Black Jack?
23 of the 57 figures for Black Jack 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 Black Jack 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 Black Jack.