Arnold Flag

Arnold

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

Arnold is a city located in Jefferson County, Missouri. Arnold has a 2026 population of 21,100. Arnold is currently growing at a rate of 0.15% annually and its population has increased by 0.92% since the most recent census, which recorded a population of 20,908 in 2020.

The median household income in Arnold is $78,370 with a poverty rate of 8.17%. The median age in Arnold is 39.7 years: 38.4 years for males, and 41.8 years for females. For every 100 females there are 94.1 males.

21.1K
Total Population
1,830
Density (mi²)
32 0.15%
Growth

Arnold Population

Arnold Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202621,100320.15%
202521,068320.15%
202421,036-66-0.31%
202321,1022181.04%
202220,884-23-0.11%
202120,90790.04%
202020,908-226-1.07%
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%
201020,875670.32%
200019,9651,1376.04%
199018,828-313-1.64%
198019,14114,141282.82%
19705,0004,400733.33%
196060000%

Median Age

Overall: 39.7 years
Female: 41.8 years
Male: 38.4 years

Arnold Adults

There are 16,624 adults, (4,078 of whom are seniors) in Arnold.

Sex Ratio

Female: 10,795 (51.5%)
Male: 10,161 (48.5%)

Demographics

The racial composition of Arnold includes 88.91% 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)
White18,63388.91%
Two or more races1,7548.37%
Asian3801.81%
Other race1160.55%
Black or African American520.25%
Native Hawaiian or Pacific Islander140.07%
Native American70.03%
Race
Population ↓
Percentage (of total)
Two or more races3411.63%
White1820.87%
Other race250.12%
Race
Population ↓
Percentage (of total)
White18,45188.05%
Two or more races1,4136.74%
Asian3801.81%
Other race910.43%
Black or African American520.25%
Native Hawaiian or Pacific Islander140.07%
Native American70.03%

Arnold Marital Status

Economics and Income Statistics

Arnold 's average per capita income is $48,370. Household income levels show a median of $78,370. The poverty rate stands at 8.17%.

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$103,916-
Families$90,723$104,270
Households$78,370$91,307
Non Families$45,685$57,750

$48,370

Average Income

$78,370

Median Household Income

8.17%

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)