Arnold, Missouri Population 2024

20,829

Arnold is a city located in Jefferson County Missouri. Arnold has a 2024 population of 20,829. Arnold is currently declining at a rate of -0.04% annually and its population has decreased by -0.15% since the most recent census, which recorded a population of 20,861 in 2020.

The average household income in Arnold is $84,672 with a poverty rate of 8.33%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Arnold is 41 years, 39 years for males, and 42.8 years for females.

Arnold Demographics

According to the most recent ACS, the racial composition of Arnold was:

  • White: 91.94%
  • Two or more races: 6.82%
  • Asian: 0.66%
  • Other race: 0.31%
  • Black or African American: 0.22%
  • Native American: 0.05%
  • Native Hawaiian or Pacific Islander: 0%
Land Area (mi²)
11.5 sq mi
Density (mi²)
1,807.40/sq mi
Growth Since 2020
-0.15% (-32)
The current population of Arnold, Missouri is 20,829 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 20,861.

Arnold, Missouri Population 2024

Population by Race

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Race
Population
Percentage (of total)
White19,16191.94%
Two or more races1,4216.82%
Asian1370.66%
Other race650.31%
Black or African American460.22%
Native American100.05%
Native Hawaiian or Pacific Islander00%

White

Two or more races

Asian

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Arnold Population by Race

Arnold Population Pyramid 2024

Arnold Median Age

41

Total

39

Male

42.8

Female

Arnold Adults

There are 16,495 adults, (3,844 of whom are seniors) in Arnold.

Arnold Age Dependency

64.7

Age Dependency Ratio

30.4

Old Age Dependency Ratio

34.3

Child Dependency Ratio

Arnold Sex Ratio

Female10,63751.04%
Male10,20348.96%

Arnold Population by Age

Arnold Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All8,5462.4274.725.3
Married4,0403.0389.410.6
Non Family3,0201.336436
Female8763.2862.137.9
Male6102.647.952.1

2.95

Average Family Size

2.42

Average Household Size

74.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Arnold Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Arnold Educational Attainment by Sex (over 25)

Arnold Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among asian people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 50.79%.

Arnold Educational Attainment by Race

All

Male

Female

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$45,532

Average Earnings

$57,128

Average Male

$37,611

Average Female

Arnold Earnings by Educational Attainment

Arnold Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Arnold Language

92.39% of Arnold residents speak only English, while 7.61% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 5.64% of the population.

Arnold Language

Arnold Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White18,6611,2646.77%
Multiple1,42130421.39%
Hispanic4167818.75%
Asian1376748.91%
Other652843.08%
Black4648.7%

8.33%

Overall Poverty Rate

6.79%

Male Poverty Rate

9.82%

Female Poverty Rate

Poverty in Arnold

The race most likely to be in poverty in Arnold is Asian, with 48.91% below the poverty level.

The race least likely to be in poverty in Arnold is White, with 6.77% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.01%. Among those working part-time, it was 9.78%, and for those that did not work, the poverty rate was 14.55%.

Arnold Poverty

rate

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Rate
Poverty
Less Than 9th Grade10.68%
Some College8.18%
High School7.45%
Bachelors or Greater3.1%

Arnold Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed47.51%
Male Unemployed24.76%
Female Employed3.48%
Male Employed1.84%

Arnold Poverty Rate by Employment Status and Sex

Arnold Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Arnold Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

49.4%

Overall Marriage Rate

53.2%

Male Marriage Rate

45.9%

Female Marriage Rate

Arnold Married by Age and Sex

male

female

Arnold Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

Arnold Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Arnold Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,218

Number of Veterans

1,184

Male Veterans

34

Female Veterans

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Arnold Veterans by War

count

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Arnold Veterans by Age

count

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Arnold Veterans by Race

Arnold Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

2.65%

Veteran Poverty Rate

21.23%

Veteran Disability Rate

Arnold Veterans by Education

LaborForceParticipation

65.6%

Labor Force Participation

62.6%

Employment Rate

3.5%

Unemployment Rate

Arnold Employment by Age

LaborForceParticipation

Arnold Employment by Race

LaborForceParticipation

Arnold Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

78.81%

Born in Arnold

94.74%

Native Born

5.26%

Foreign Born

2.33%

Non Citizen

2.94%

Naturalized

Place of Birth

94.74% of Arnold residents were born in the United States, with 78.81% having been born in Missouri. 2.33% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Arnold Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202920,789-8-0.04%
202820,797-8-0.04%
202720,805-8-0.04%
202620,813-8-0.04%
202520,821-8-0.04%
202420,829-8-0.04%
202320,837-8-0.04%
202220,845-8-0.04%
202120,853-8-0.04%
202020,861-273-1.29%
201921,134-24-0.11%
201821,158-9-0.04%
201721,167-11-0.05%
201621,178-35-0.16%
201521,213710.34%
201421,1421070.51%
201321,035480.23%
201220,987920.44%
201120,895200.1%
201020,87500%
200019,9651,1376.04%
199018,828-313-1.64%
198019,14114,141282.82%
19705,0004,400733.33%
1960600-20,189-97.11%
showing: 25 rows

Arnold Population by Year