Arnold, MO: Local News, Events & Neighbors

Arnold is a city in northeastern Jefferson County, Missouri, situated near the confluence of the Meramec and Mississippi rivers. A suburb of St. Louis, the city lies within the Greater St. Louis metropolitan statistical area. The population was 20,858 at the 2020 United States census, which makes it the most populous community in the county.

Official town website ↗

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

How Arnold ranks

All →

#10Most conserved land in MO #20Rent easiest to afford in MO #72Highest income in MO All MO rankings →

Town numbers

ZIP code63010

Area code636

Living in Arnold

Housing in Arnold

$276K▲ 3.7% in a year Typical home value · Zillow

The typical Arnold home is worth about $276,000, up 3.7% in a year, close to the Missouri typical home.

A strong seller's market

Buyer’sBalancedSeller’s

Days on market15

Sale-to-list102.8%

Sold in May18

Zillow Home Value Index · Redfin Data CenterHousing market →

Safety in Arnold

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Not graded

A grade needs all of the FBI's latest years (2023–2025). Arnold's police department reported only 2023 and 2025, so we don't grade it yet. The figures below are still real.

Violent crime per 1,000

Arnold 0.7

Missouri 4.3

U.S. 3.3

Property crime per 1,000

Arnold 8

Missouri 16.9

U.S. 15.5

FBI crime data, 2025 · crimes reported to policeCrime & safety →

Health in Arnold

Compared with Missouri

5better than MO

of 32 measures CDC estimates. The other 27 are too close to call.

Conditions 1▲ 11 close Habits all close Care all close Mind all close Everyday needs 4▲ 0 close

BetterToo close to callWorse

What stands out

11.1%Fewer older adults who have lost all their teethMO 15.8% · better 10.8%Fewer adults facing food insecurityMO 13.7% · better

Care nearby

Mercy Hospital SouthSaint Louis · 5.9 mi · ER

Compass HealthArnold · 0.5 mi · sliding-scale fees

Primary careShortage · county-wide

DentalNo shortage

Mental healthNo shortage

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

Schools in Arnold

All Arnold schools →

B

School Grade B

The public schools Arnold’s kids attend, from kindergarten through graduation, outperform 61% of Missouri’s districts on state tests and graduation. Among towns with similar incomes, they sit near the middle.

See how Arnold’s schools compare in MO →

DistrictFOX C-6Schools8

Rockport Heights Elem. BElementary · Grades K–5 · 386 students Fox Elem. C+Elementary · Grades K–5 · 355 students Sherwood Elem. B+Elementary · Grades K–5 · 347 students St. Johns Lutheran SchoolElementary · Grades PK–8 · 255 students Holy Child Catholic SchoolElementary · Grades PK–8 · 238 students Fox Middle C+Middle · Grades 6–8 · 570 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.