About

Life in Arnold

Living in Arnold means settling into a stable, unpretentious suburb where you're close enough to St. Louis for work and culture but far enough removed to feel like you actually have space and affordability. The median household income sits around $78,000, and homes run roughly $220,000—reasonable for the metro area—though you should expect rents around $1,112 monthly if you're not ready to buy yet.

Arnold at a Glance

Population, income, housing and more

Median Age

39.7 yrs

Poverty Rate

8.2%

Foreign-Born

5.3%

Broadband Internet

91.4%

of households

Population Growth

+0.5%

recent change · Census Bureau

Median household income

Arnold$78,370
Missouri avg$70,702
US$80,734

Demographics5.3% foreign-born, most often from Bosnia and Herzegovina

Who lives in Arnold: race and ethnicity, ages, households, languages and countries of origin

In Arnold, the largest foreign-born group is from Bosnia and Herzegovina (37.0%), and 3.6% of residents speak Russian/Slavic at home.

Under 18

20.7%

of residents

65 and Older

19.5%

of residents

Households with Kids

33.9%

anyone under 18

Living Alone

24.0%

of households

Married Couples

48.7%

of households

Avg Household Size

2.49

people

Race & Ethnicity

White88.0%
Two or more races6.7%
Hispanic or Latino2.6%
Asian1.8%

Hispanic or Latino of any race; other groups are non-Hispanic

Top countries of origin (foreign-born)

Bosnia and Herzegovina37.0%
Germany17.0%
China6.4%
Mexico6.1%
Russia5.4%
Ukraine4.4%
Laos4.1%
Philippines3.3%
Canada2.6%
Venezuela2.3%

Languages Spoken at Home

English only92.2%
Russian/Slavic3.6%
Chinese1.3%
Spanish0.9%
German/Germanic0.9%
Other Asian/Pacific0.5%
Other Indo-European0.2%
Tagalog/Filipino0.2%

Cost of Livingrent 8% above MO average

Rent, home values, and income in Arnold

In Arnold, rent runs 8% above the MO average.

Median rent (per month)

Arnold$1,112
Missouri avg$1,033
US$1,413

Median home value

Arnold$220,000
Missouri avg$230,300
US$332,700

Rent Burdened

32.4%

spending 30%+ of income on rent

Severely Rent Burdened

12.2%

spending 50%+

Cost of Living Index

95.1

metro area (BEA) · US avg = 100

Median Property Tax

$1,729

per year, owner-occupied homes

Homeowners

79.8%

of occupied homes are owned

Typical Home Built

1977

median year built

Vacant Homes

6.5%

of housing units

Home Value Trend

$219,300
$272,801
202120222023202420252026

Latest: $272,801 (September 2026)

Jobs & Economyunemployment about average for MO

Unemployment in Arnold and typical pay across the metro area

Unemployment in Jefferson County, which includes Arnold, is close to the MO average.

Unemployment rate

Arnold3.7%
Missouri avg4.0%
US4.3%

Arnold: Jefferson County rate (county-wide) · BLS annual average

Unemployment Rate — 10 Year Trend

4.3%
3.6%
3.1%
3%
6.1%
3.8%
2.5%
2.8%
3.4%
3.7%
2016201720182019202020212022202320242025

Jefferson County (county-wide) · Annual averages

What Arnold Residents Do for Work · share of employed residents by industry

Education & health care19.9%
Professional & business services13.4%
Manufacturing12.9%
Retail11.8%
Construction9.9%
Arts, hospitality & food service7.4%
Finance & real estate6.0%
Transportation & utilities5.5%

City residents, wherever they work

Median Salary by Occupation · metro area

Management$100,940
Healthcare$78,190
Business & Finance$77,010
Education$51,900
Production$45,140
Office & Admin$43,310
Transportation$39,330
Sales$35,500

St. Louis, MO-IL metro area

Commute27.2 min avg

How Arnold residents get to work, and the nearest airports

In Arnold, most residents drive alone to work (85%), and 54% get there in under 30 minutes.

How People Get to Work

Drive alone84.8%
Carpool6.2%
Public transit0.0%
Walk0.6%
Work from home8.1%
Other0.3%

Commute Time Distribution

Under 15 min15.3%
15–29 min38.8%
30–44 min29.0%
45–59 min11.7%
60+ min5.2%

Nearest airports · with airline service

  • St. Louis Lambert International Airport (STL)

    Medium hub7.5M passengers boarded in 2025

    22 mi

Straight-line distance. Size is the FAA’s hub category, based on passenger traffic: regional airports may have only a few flights a day.

Safetyviolent crime 77% below national average

Crime rates for 2025

Violent crime in Arnold runs 77% below the national average.

Violent Crime Rate

76

per 100,000 residents

Below average (329 national, 2025)

Property Crime Rate

830.7

per 100,000 residents

Below average (1,552 national, 2025)

Arnold Police Department

Natural DisastersThunderstorm Wind most common — 16 events in 2025

Natural hazard risk, storms and earthquakes

FEMA National Risk Index

Relatively Moderate

90.5 / 100

Compares expected losses from natural hazards, social vulnerability and community resilience against every US county (higher = more risk).

Strong wind · Very HighLightning · HighTornado · HighCold wave · ModerateEarthquake · Moderate

Jefferson County, county-wide · FEMA NRI December 2025

In Jefferson County, which includes Arnold, the most common type is thunderstorm wind, with 16 recorded events in 2025.

Most common events:

Thunderstorm WindHailFlash FloodExcessive HeatTornado

Storm events by year

YearEventsTop TypeProperty Damage
202516Thunderstorm Wind$852,000
202415Hail$170,000
202319Thunderstorm Wind$6,000
202210Hail$140,000
202110Thunderstorm Wind$42,000
20206Thunderstorm WindNone reported
20198Thunderstorm WindNone reported
201810DroughtNone reported

Property damage is the National Weather Service's estimate filed with each event. “None reported” means the events were logged with $0 damage; “Not estimated” means no estimate was filed. Storms covering several counties aren't counted here, since NOAA doesn't split their damage by county.

1 earthquake of magnitude 2.5+ within 100 miles in the past year

Jefferson County, county-wide

Air Quality42 median AQI — Good

Days by air quality category (2025)

Air quality in Jefferson County, which includes Arnold, is typically good — 268 good-air days per year.

Median AQI

42

Good Days

268

per year

Moderate Days

93

per year

Unhealthy Days

0

per year

Jefferson County, county-wide

Climate87°F summers, 25°F winters

30-year climate averages (1991–2020) — monthly temperatures and precipitation

Arnold has warm summers (avg high 87°F) and cold winters (avg low 25°F).

Spring (Mar–May)

67°/45°F

avg high / low

Summer (Jun–Aug)

87°/67°F

avg high / low

Fall (Sep–Nov)

69°/47°F

avg high / low

Winter (Dec–Feb)

44°/25°F

avg high / low

Annual Precipitation

42.8"

Annual Snowfall

10.2"

Hot Days/Year

39

days above 90°F

Freeze Days/Year

97

days below 32°F

Rainy Days/Year

97

Average month

High °FLow °FPrecip (in)
10°30°50°70°90°5.5"Jan: 2.67" precipitationFeb: 2.26" precipitationMar: 3.55" precipitationApr: 4.63" precipitationMay: 4.80" precipitationJun: 4.30" precipitationJul: 5.02" precipitationAug: 3.09" precipitationSep: 3.35" precipitationOct: 3.04" precipitationNov: 3.33" precipitationDec: 2.75" precipitation22°JJan: high 41°F, low 22°FFFeb: high 46°F, low 26°FMMar: high 56°F, low 35°FAApr: high 68°F, low 45°FMMay: high 76°F, low 56°FJJun: high 85°F, low 65°F89°JJul: high 89°F, low 69°FAAug: high 87°F, low 67°FSSep: high 80°F, low 59°FOOct: high 70°F, low 46°FNNov: high 56°F, low 35°FDDec: high 45°F, low 27°F
Show month-by-month table ↓
MonthHighLowPrecip
Jan41°F22°F2.67"
Feb46°F26°F2.26"
Mar56°F35°F3.55"
Apr68°F45°F4.63"
May76°F56°F4.80"
Jun85°F65°F4.30"
Jul89°F69°F5.02"
Aug87°F67°F3.09"
Sep80°F59°F3.35"
Oct70°F46°F3.04"
Nov56°F35°F3.33"
Dec45°F27°F2.75"

Healthcare

Hospitals, ratings, and health insurance in Arnold

Uninsured

7.5%

of residents

No hospitals inside Arnold's limits — nearest hospitals · within 15 miles

Mercy Hospital South

Acute Care Hospitals · ER available · 5.6 mi away · Saint Louis

Ssm St Clare Health Center

Acute Care Hospitals · ER available · 8.6 mi away · Fenton

St Louis Forensic Treatment Center

Psychiatric · 13.2 mi away · Saint Louis

Not rated

Adult Health · vs. the typical US place

Obesity39.4%US 36.8%
Diabetes11.1%US 12.6%
High blood pressure35.4%US 37.1%
Current smoking15.7%US 15.0%
No leisure-time physical activity27.3%US 26.6%
Depression23.7%US 23.0%
Asthma10.6%US 10.7%
Routine checkup in past year79.0%US 78.2%

Share of adults. Modeled estimates, not counted cases. “US” = the typical US place.

Medicare-certified hospitals only. Doesn’t include clinics, urgent care, or freestanding ERs.

Education13.9:1 student/teacher ratio

Schools and degree attainment in Arnold

Arnold's student/teacher ratio is 13.9:1 (lower than the national average of 16:1), and 25.4% of adults 25+ hold a bachelor's degree or higher.

Public Schools

6

within city limits

Private Schools

3

within city limits

College Degree Rate

25.4%

adults 25+ with bachelor's or higher

Student/Teacher Ratio

13.9:1

National avg 16:1

Schools located within city limits (2023) — school-level metrics change slowly year to year

Colleges Near Arnold (within 15 miles)

Webster University

11.1 mi away

Private nonprofit · 4-year · 2,304 students · in-state tuition $32,690 · 55% graduate · median earnings $56,096 (10 yrs after entry)

Degree-granting colleges with 100+ students, placed by campus location (main campuses only — branch campuses are reported under their parent school)

Parks & Recreationclosest: Ulysses S Grant National Historic Site, 9 mi

Nearby national parks, recreation areas and public libraries for Arnold

Arnold has 4 nearby national parks or recreation areas, closest being Ulysses S Grant National Historic Site (9 mi away).

Nearby National Parks & Recreation Areas

Ulysses S Grant National Historic Site

National Historic Site

9 mi away

Gateway Arch National Park

National Park

17 mi away

Ste. Geneviève National Historical Park

National Historical Park

36 mi away

New Philadelphia National Historic Site

National Historic Site

93 mi away

Public Libraries in Arnold

Arnold Branch

1701 Missouri State Road, Arnold

Branch~60 hrs/week

Cities Near Arnold

The closest cities within 60 miles

Planning a move to Arnold?

Read our full moving guide — what it's really like to live here.

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Arnold FAQ

Is Arnold, Missouri affordable?⌄

Arnold's median rent is $1,112/month, which is below the national average, making it relatively affordable. The median household income is $78,370/year. Median home value is $220,000.

Is Arnold, Missouri safe?⌄

Arnold's violent crime rate was 76 per 100,000 residents in 2025, which is well below the national average — one of the safer cities in the country of 329/100k that year. Property crime rate is 831 per 100,000. As with any city, crime rates vary by neighborhood.

What is the job market like in Arnold, Missouri?⌄

Jefferson County, which includes Arnold, has an unemployment rate of 3.7%, which is solid, slightly below the national average of 4.3%.

What is the cost of living in Arnold, Missouri?⌄

The cost of living in Arnold is primarily driven by housing. Median rent is $1,112/month and median household income is $78,370/year. The median home value is $220,000. About 32% of renters spend more than 30% of their income on housing.

How is the commute in Arnold, Missouri?⌄

The average commute in Arnold is 27 minutes, which is about average compared to the national average of 26 minutes.

Data from the US Census Bureau, BLS, FBI, NOAA, EPA, Zillow Research and other public sources. Where our data comes from