Arnold, Missouri Population 2020

21,045

Arnold is a city located in Missouri. With a 2020 population of 21,045, it is the 34th largest city in Missouri and the 1775th largest city in the United States. Arnold is currently declining at a rate of -0.07% annually but its population has increased by 1.14% since the most recent census, which recorded a population of 20,808 in 2010. Arnold reached it's highest population of 21,163 in 2015. Spanning over 12 miles, Arnold has a population density of 1,826 people per square mile.

The average household income in Arnold is $73,408 with a poverty rate of 10.21%. The median rental costs in recent years comes to $955 per month, and the median house value is $153,300. The median age in Arnold is 40.8 years, 37.8 years for males, and 43.2 years for females. For every 100 females there are 99.9 males.

Arnold Demographics

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

  • White: 97.79%
  • Two or more races: 0.98%
  • Black or African American: 0.40%
  • Other race: 0.33%
  • Native American: 0.27%
  • Asian: 0.24%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Arnold, Missouri is 21,045, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 21,073.The last official US Census in 2010 recorded the population at 20,808.

Arnold, Missouri Population 2020

Population by Race

Race Population Percentage
White20,64097.79%
Two or More Races2060.98%
Black or African American850.40%
Some Other Race690.33%
American Indian and Alaska Native560.27%
Asian510.24%

Arnold Population Pyramid 2020

Arnold Median Age

40.8


Total

37.8


Male

43.2


Female

Arnold Adults

There are 16,591 adults, (3,753 of whom are seniors) in Arnold.

Arnold Age Dependency

64.4

Age Dependency Ratio

29.2

Old Age Dependency Ratio

35.2

Child Dependency Ratio

Arnold Sex Ratio

Female

10,559

50.03%

Male

10,548

49.97%

Arnold Households and Families

Arnold Renter vs Owner Occupied by Household Type

Arnold Household Types

Type Owner Renter
Married88.4%11.6%
All72.7%27.3%
Non Family61.2%38.8%
Male54.8%45.2%
Female47.1%52.9%

72.7%

Rate of Home Ownership

Type Count Average Size Owned
All8,3182.5272.7
Married4,0933.1288.4
Non Family2,9071.2861.2
Female9403.3347.1
Male3783.4154.8

3.07

Average Family Size

2.52

Average Household Size

3.9%

Unmarried (Opposite Sex)

0.5%

Unmarried (Same Sex)

Arnold Education

Education Attained Count Percentage
Less Than 9th Grade4302.87%
9th to 12th Grade1,2818.56%
High School Graduate5,31135.50%
Some College3,37322.55%
Associates Degree1,58310.58%
Bachelors Degree1,87112.51%
Graduate Degree1,1127.43%

Arnold Educational Attainment by Race

Name Total High School Bachelors
White14,43412,7552,894
Hispanic2792698
Black735833
Other Race5959
Native American565611
Asian515137
Multiple Races2013

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 72.55%.

Name Average Male Female
Overall$38,923$47,032$33,272
Less Than High School$23,542$19,250$27,188
High School Grad$30,945$36,192$27,807
Some College$38,577$48,058$31,393
Bachelors Degree$57,188$64,267$51,985
Graduate Degree$64,181$67,625$63,750

$38,923

Average Earnings

$47,032

Average Male

$33,272

Average Female

Arnold Language

Arnold Language by Age

Arnold Language

95.96% of Arnold residents speak only English, while 4.04% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 2.80% of the population.

Arnold Poverty

Arnold Poverty by Race

Name Total In Poverty Poverty Rate
White20,0652,08710.40%
Hispanic392389.69%
Black851315.29%
Multiple20683.88%

10.21%

Overall Poverty Rate

7.30%

Male Poverty Rate

13.13%

Female Poverty Rate

Poverty in Arnold

The race most likely to be in poverty in Arnold is Black, with 15.29% below the poverty level.

The race least likely to be in poverty in Arnold is Multiple, with 3.88% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.53%. Among those working part-time, it was 12.90%, and for those that did not work, the poverty rate was 16.37%.

Name Poverty
Less Than High School12.85%
High School9.37%
Some College6.80%
Bachelors or Greater2.18%
Name Poverty
Female Unemployed39.57%
Male Unemployed15.27%
Female Employed4.67%
Male Employed1.69%

Arnold Income

Arnold Income by Household Type

Name Median Mean
Households$63,702$73,408
Families$69,989$84,299
Married Families$84,980-
Non Families$38,202$46,909

Arnold Marital Status

Arnold Marital Status

Marriage Rates

50.1%

Overall Marriage Rate

51.8%

Male Marriage Rate

48.6%

Female Marriage Rate

Arnold Married by Age and Sex

Arnold Marriage

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

Arnold Marital Status by Race

Arnold Veterans

1,716

Number of Veterans

1,549

Male Veterans

167

Female Veterans

War Veterans
Vietnam707
Second Gulf War282
Korea186
First Gulf War185
World War II35
Name Veterans % of Total
White1,68710.37%
Indian2951.79%
Hispanic175.56%

$Arnold Veterans by Education

4.21%

Veteran Poverty Rate

30.26%

Veteran Disability Rate

Arnold Employment Status

62.6%

Labor Force Participation

59.4%

Employment Rate

4.9%

Unemployment Rate

Arnold Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

76.82%

Born in Missouri

96.99%

Native Born

3.01%

Foreign Born

1.01%

Non Citizen

Place of Birth

96.99% of Arnold residents were born in the United States, with 76.82% having been born in Missouri. 1.01% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Year Population Growth Annual Growth Rate
202021,045-14-0.07%
201921,059-14-0.07%
201821,073-36-0.17%
201721,109-14-0.07%
201621,123-40-0.19%
201521,163670.32%
201421,0961030.49%
201320,993450.21%
201220,948870.42%
201120,861150.07%
201020,8468810.43%
200019,9651,1370.59%
199018,828-313-0.16%
198019,14114,14114.37%
19705,0004,40023.62%
19606000.00%