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CITY

Arnold

Missouri · 20,994 residents (2025 est.) · 11.528 sq mi
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The short version

Arnold has roughly average household income, with a median household income of $78,370. Population has held roughly steady since 2000. Median home value has more than doubled since 2000, reaching $220,000.

At a glance
Average income
near the US median
US median: $82,259
Mid-age
median age 39.7
US median: 38.9
Less educated
25% hold a bachelor's degree
US average: 36%
Less affordable
home values up 28%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
20,956
+5%since 2000
from 19,965 in 2000
1990 – 2025
Population density
1,818 / sq mi
+5%since 2000
from 1,732 / sq mi in 2000
US average: 281
Median age
39.7
+8%since 2000
from 36.7 in 2000
US average: 38.9

PEP 2025 EST:20,994 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
19K19K20K21K21K1990201020202024Arnold
202421K
1990201020202024
Section 02

Income & economy

Median household income
$78,370
−9%inflation adjusted, since 2000
from $47,188 in 2000
US average: $82,259
1990 – 2024
Per capita income
$37,598
+85%since 2000
from $20,378 in 2000
US average: $44,673
Households earning $100K+
51.8%
+15.5 ptssince 2009
from 36.3% in 2009
US average: 53.3%
Poverty rate
8.2%
+3.7 ptssince 2000
from 4.4% in 2000
US average: 12.5%
Income inequality (Gini)
0.380
+7%since 2010
from 0.356 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade12.9%
US avg: 9.9%
Information11.8%
US avg: 10.8%
Wholesale trade9.9%
US avg: 6.9%
Other services6%
US avg: 6.7%
Finance & insurance5.5%
US avg: 5.9%
Public administration4.2%
US avg: 4.8%
Professional, scientific, technical3.8%
US avg: 5.1%
Transportation & warehousing2.9%
US avg: 2.2%
Education & health services1.8%
US avg: 0.9%
Arts, entertainment, food1.4%
US avg: 1.9%
Agriculture, forestry, fishing0.3%
US avg: 1.6%
Construction0.3%
US avg: 1.2%
Manufacturing0%
US avg: 0.4%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$220,000
+28%inflation adjusted, since 2000
from $94,400 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$1,112
+6%inflation adjusted, since 2000
from $575 in 2000
US average: $1,442
Owner-occupied
79.8%
−1.4 ptssince 2000
from 81.2% in 2000
20.2% rent
Vacancy rate
6.5%
−1.5 ptssince 2009
from 8.0% in 2009
US average: 10.0%
Owner cost-burdened
18.5%
−2.0 ptssince 2009
from 20.5% in 2009
US average: 22.9%
Renter cost-burdened
32.4%
−4.4 ptssince 2009
from 36.9% in 2009
US average: 47.4%
Afford Score
2.8
+40%since 2000
from 2.0 in 2000
1990 – 2024
Gentrification Score
39
RELATED:See current rent listings in Arnold on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic97.2%(19,408)
Black0.3%(59)
Hispanic / Latino1%(207)
Asian0.4%(75)
Other0%
Diversity Score4.3%(851)
2024
White, non-Hispanic88%(18,451)
Black0.2%(52)
Hispanic / Latino2.6%(548)
Asian1.8%(380)
Other7.3%(1,525)
Diversity Score27.3%(5,723)
Diversity Score
27
+541%since 2000
from 4 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
25.4%
+13.9 ptssince 2000
from 11.5% in 2000
US average: 35.6%
High school or higher
90.7%
+11.5 ptssince 2000
from 79.2% in 2000
US average: 89.6%
Graduate degree
8.1%
+5.7 ptssince 2000
from 2.4% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
27.2 min
+53%since 2000
from 17.8 min in 2000
US average: 26.5
Drive alone to work
84.8%
−2.3 ptssince 2009
from 87.2% in 2009
US average: 68.9%
Carpooled to work
6.2%
−3.2 ptssince 2009
from 9.4% in 2009
US average: 8.5%
Public transit
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 3.2%
Worked from home
8.1%
+6.3 ptssince 2009
from 1.8% in 2009
US average: 15.0%
Walked to work
0.6%
−0.2 ptssince 2009
from 0.8% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
2.7%
−1.5 ptssince 2009
from 4.2% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
2.8%
−4.0 ptssince 2011
from 6.8% in 2011
US average: 5.2%
Labor force participation
65.1%
−4.2 ptssince 2011
from 69.3% in 2011
US average: 63.5%
Self-employed
13.1%
+3.9 ptssince 2009
from 9.2% in 2009
US average: 13.1%
Management & professional
37.8%
−22.9 ptssince 2009
from 60.7% in 2009
US average: 42.5%
Section 08

People & community

Male
48.5%
−0.6 ptssince 2009
from 49.1% in 2009
Female
51.5%
+0.6 ptssince 2009
from 50.9% in 2009
Foreign born
5.3%
+3.1 ptssince 2009
from 2.2% in 2009
US average: 14.1%
Veterans
6.3%
−41.6 ptssince 2009
from 47.9% in 2009
US average: 6.2%
With a disability
14.2%
−0.4 ptssince 2012
from 14.6% in 2012
US average: 13.3%
Uninsured
7.5%
−84.2 ptssince 2013
from 91.7% in 2013
US average: 8.4%
Broadband at home
91.4%
+10.1 ptssince 2017
from 81.3% in 2017
US average: 91.0%
English only at home
92.2%
−4.8 ptssince 2016
from 97.0% in 2016
US average: 77.7%
Spanish at home
0.9%
+0.1 ptssince 2016
from 0.8% in 2016
US average: 13.6%
Drill deeper

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Frequently asked

How many people live in Arnold, Missouri?

Arnold, Missouri has about 20,956 residents according to the 2024 American Community Survey.

What is the median household income in Arnold, Missouri?

The typical household in Arnold, Missouri earns about $78,370 a year. Half of households make more than that, and half make less.

Is Arnold, Missouri expensive?

In Arnold, Missouri, the median home is worth about $220,000, and the typical rent is about $1,112 a month.

How educated are people in Arnold, Missouri?

About 25.4% of adults age 25 and over in Arnold, Missouri hold a bachelor's degree or higher.

What is the poverty rate in Arnold, Missouri?

About 8.2% of people in Arnold, Missouri live below the federal poverty line.

Has Arnold, Missouri grown since 1990?

Yes, Arnold, Missouri has grown since 1990. The population has added about 2,128 residents, a change of about 11 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →