Arnold Flag

Arnold

County Seat:
No
Area (mi²):
11.528
State:
Missouri

Arnold is a city located in Jefferson County, Missouri. Arnold has a 2025 population of 21,196. Arnold is currently growing at a rate of 0.33% annually and its population has increased by 1.64% since the most recent census, which recorded a population of 20,853 in 2020.

The average household income in Arnold is $88,067 with a poverty rate of 7.71%.The median age in Arnold is 39.9 years: 38.7 years for males, and 42.9 years for females.

21.2K
Total Population
1,839
Density (mi²)
69 0.33%
Growth

Arnold Population

Arnold Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Arnold includes 90.9% White, and smaller percentages for Asian, other race, Black or African American, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White18,98490.9%
Two or more races1,5387.36%
Asian2181.04%
Other race910.44%
Black or African American420.2%
Native Hawaiian or Pacific Islander80.04%
Native American30.01%

Arnold Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Arnold's average per capita income is $46,549. Household income levels show a median of $75,194. The poverty rate stands at 7.71%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$102,862-
Families$90,766$102,549
Households$75,194$88,067
Non Families$40,236$54,425

$46,549

Average Income

$75,194

Median Household Income

7.71%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)