Black Jack is a second-ring suburb of St. Louis in northern St. Louis County, Missouri, United States. The population was 6,634 at the 2020 census. A post office called Black Jack was established in 1872, and operated until 1906. The community was named for a grove of blackjack oak trees near the original town site.

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

How Black Jack ranks

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#1Lowest depression in MO #27Closest to a top hospital in MO #52Most walkable in MO All MO rankings →

Town numbers

ZIP codeSign in to add

Area code314

Living in Black Jack

Housing in Black Jack

$220K▲ 3.8% in a year Typical home value · Zillow

The typical Black Jack home is worth about $220,000, up 3.8% in a year, 18% below the Missouri typical home.

A strong seller's market

Buyer’sBalancedSeller’s

Days on market7

Sale-to-list98%

Sold in May6

Zillow Home Value Index · Redfin Data CenterHousing market →

Work & commute in Black Jack

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Most working residents leave Black Jack for work: only 1% work in town. The top destinations are St. Louis (22%), Maryland Heights (5%) and Clayton (4%). Half commute less than 12 miles.

St. Louis

22%

Maryland Heights

Clayton

Hazelwood

1%Work in townlive and work in Black Jack 12 miWhere do people commute?the commute map 822Jobs based herea commuter town

Census LEHD 2023 · ACSWork & commute in Black Jack →

Health in Black Jack

Health Grade C

Healthier than 26% of U.S. towns on seven CDC estimates.

Compared with Missouri

8better than MO·14worse

of 32 measures CDC estimates. The other 10 are too close to call.

Conditions 2▲ 5▼ 5 close Habits 1▲ 2▼ 1 close Care 5▲ 2 close Mind 3▼ 2 close Everyday needs 4▼ 0 close

BetterToo close to callWorse

What stands out

11.5%Fewer binge drinkersMO 16.3% · better 6.8%Fewer adults who have had cancerMO 8.6% · better 15.7%More adults facing a utility shut-offMO 9% · worse

Care nearby

Christian Hospital NortheastSaint Louis · 2.1 mi · ER

Betty Jean Kerr People's Health CentersFlorissant · 1.8 mi · sliding-scale fees

Primary careNo shortage

DentalNo shortage

Mental healthNo shortage

CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Black Jack · CMS · HRSAHealth in Black Jack →

Natural hazards in Black Jack

High

Expected storm and flood damage is higher than in 72% of U.S. communities.

🌊 Inland flooding🌡️ Heat waves🏚️ Earthquakes

1Does Black Jack flood?paid flood claims since 1979 5Disasters that paid out herefederal disasters sent FEMA money to Black Jack MapBlack Jack vs. its neighborsnearby towns shaded by rating

FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Black Jack →

Climate in Black Jack

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Black Jack has chilly winters and warm summers. A typical July afternoon reaches 88°, a January night drops to 23°, and about 17 inches of snow falls in a normal winter.

43° / 26°Winter

66° / 46°Spring

87° / 67°Summer

68° / 47°Fall

How much snow does Black Jack get?About 17 inches a winter.Rain & snow →When is the first frost?Around Nov 4, with the last in spring around Apr 2.Frost dates →Is it warmer than it used to be?+0.9° vs. the 20th century.Then & now →

NOAA U.S. Climate Normals, 1991–2020Climate in Black Jack →

Schools in Black Jack

All Black Jack schools →

School Grade D

The public schools Black Jack’s kids attend, from kindergarten through graduation, trail 93% of Missouri’s districts on state tests and graduation. Among towns with similar incomes, they rank near the bottom.

See how Black Jack’s schools compare in MO →

DistrictHAZELWOODSchools4

Jury Elem. DElementary · Grades PK–5 · 480 students Jamestown Elem. DElementary · Grades PK–5 · 314 students Salem Lutheran SchoolElementary · Grades PK–8 · 124 students Central Middle DMiddle · Grades 6–8 · 692 students

School data from the U.S. Department of Education (NCES, EDFacts). The School Grade is our own summary of state test results and graduation rates, graded within MO. Ratings are from neighbors.