Arnold, MO demographics:
population, income, and more

Total population
20,956
0.3% year-over-year change
Median household income
$78,370/yr
4.2% year-over-year change
Housing units
8,982
-2.4% year-over-year change

Arnold population

How many people live in Arnold

Arnold is home to 20,956 residents, according to the most recent Census data. Gender-wise, 48.5% of Arnold locals are male, and 51.5% are female.

Total population
20,956
0.3% year-over-year change
Gender ratio
Male
48.5%
10,161
Female
51.5%
10,795
Value Percent YoY change
Male 10,161 48.5% -1.9%
Female 10,795 51.5% 2.5%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Arnold is 40, with the population distributed as follows: about 16.1% are children under 15, then 9.9% are in the 15 to 24 age group. Adults between 25 and 44 make up 28.8% of the population, while another 25.7% fall into the 45 to 64 bracket. Finally, around 19.5% are 65 or older.

Median age
39.7
Age breakdown
Under 15
16.1%
15 to 24
9.9%
25 to 44
28.8%
45 to 64
25.7%
Over 65
19.5%
Value Percent YoY change
Under 15 3,382 16.1% -0.4%
15 to 24 2,076 9.9% 5.3%
25 to 44 6,042 28.8% -1.0%
45 to 64 5,378 25.7% 0.0%
Over 65 4,078 19.5% 1.0%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Arnold, 94% of the population are US-born citizens, while 3.9% have gained naturalized citizenship. At the same time, 2.1% of residents are non-citizens. As for race, 88.9% of locals are Caucasian, 0.2% are African American and 1.8% have Asian roots. There’s also a share of 8.4% that includes residents with two or more races.

Citizenship
U.S.-born citizens
94%
Non-U.S.-born citizens
3.9%
Non-citizens
2.1%
Value Percent YoY change
U.S.-born citizens 19,700 94% 0.4%
Non-U.S.-born citizens 816 3.9% 8.7%
Non-citizens 440 2.1% -14.7%
Racial breakdown
White
88.9%
Black or African American
0.2%
American Indian and Alaska Native
0%
Asian
1.8%
Native Hawaiian and other Pacific Islander
0.1%
Two or more races
8.4%
Other
0.6%
Value Percent
White 18,633 88.9%
Black or African American 52 0.2%
American Indian and Alaska Native 7 0%
Asian 380 1.8%
Native Hawaiian and other Pacific Islander 14 0.1%
Two or more races 1,754 8.4%
Other 116 0.6%

Households in Arnold

A peek inside Arnold households

Arnold has 8,394 households, with an average of 2 members in each. Of these, 65.9% are families, while the remaining 34.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
8,394
-1.6% year-over-year change
Average people per household
2
Non-family households
2,863
Family households
5,531
Value Percent YoY change
Non-family households 2,863 34.1% -0.3%
Family households 5,531 65.9% -2.3%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Arnold

The housing landscape of Arnold

Arnold's housing consists of 8,982 units, with 79% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 5.8% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 3.4% of the housing landscape.

Housing units
8,982
-2.4% year-over-year change
Housing types
Value Percent
1 unit, detached 7,092 79%
1 unit, attached 523 5.8%
2 units 55 0.6%
3 or 4 units 277 3.1%
5 to 9 units 157 1.8%
10 to 19 units 316 3.5%
20 to 49 units 177 2%
50 or more units 59 0.7%
Mobile home 310 3.4%
Boat, RV, van, etc. 16 0.2%
Homes built since 2020
77
79.1% year-over-year change

The age of buildings in Arnold

In Arnold, the median construction year is 1977. About 1.8% of homes were built before the 1940s, with another 1.5% going up by 1949. Most development happened in the second half of the 20th century. Then, 10.1% of homes were added from 2000 to 2009, 5.3% between 2010 and 2019, and 0.9% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 162 1.8% 107.7%
Built between 1940 and 1949 136 1.5% -31.0%
Built between 1950 and 1959 1,077 12% -3.8%
Built between 1960 and 1969 2,307 25.7% -3.1%
Built between 1970 and 1979 1,195 13.3% 1.4%
Built between 1980 and 1989 1,024 11.4% -3.0%
Built between 1990 and 1999 1,626 18.1% 3.4%
Built between 2000 and 2009 905 10.1% -20.7%
Built between 2010 and 2019 473 5.3% 8.0%
Built in 2020 or later 77 0.9% 79.1%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Arnold occupancy rates

Out of the 8,394 occupied housing units in Arnold, 79.8% are owner-occupied, while 20.2% are lived in by tenants. Meanwhile, 6.5% of all homes on the local market sit vacant.

Occupied housing units
8,394
-1.6% year-over-year change
Occupancy breakdown
Renter occupied
1,695
Owner occupied
6,699
Value Percent YoY
change
Renter occupied 1,695 20.2% -2.5%
Owner occupied 6,699 79.8% -1.4%
Unoccupied housing units
6.5%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Arnold housing costs

Housing costs in Arnold come to a median of $1,093 per month, while tenants specifically pay a median gross rent of $1,112.

Median housing costs per month
$1,093/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Arnold
$1,112/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Arnold

Arnold education at a glance

About 39.5% of the population in Arnold went to high school, while 21.8% pursued college studies. Another 10.8% earned an associate degree and 17.4% hold a bachelor’s. Meanwhile, 7.7% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 463 2.8% 19.9%
High school diploma 6,562 39.5% -1.5%
College diploma 3,618 21.8% -1.5%
Associate degree 1,800 10.8% -8.6%
Bachelor's degree 2,899 17.4% 6.5%
Graduate degree 1,282 7.7% 4.0%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Arnold

How much people earn in Arnold

The average annual household income in Arnold was $91,307 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +3.7% change from the previous year. At the same time, the median income stood at $78,370, reflecting a +4.2% shift over the same period.

Average household income in Arnold
$91,307/year
3.7% year-over-year change
Median household income in Arnold
$78,370/year
4.2% year-over-year change

Arnold income by age

In Arnold, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $96,179. Those with someone between 45 and 64 in charge, often well established professionally, earn $90,517 overall. Overall, 91.8% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $96,179 5.5%
45 - 64 $90,517 -7.2%
Over 65 $51,190 23.5%
Above poverty level
18,955
Below poverty level
1,698
Value Percent YoY
change
Above poverty level 18,955 91.8% 0.1%
Below poverty level 1,698 8.2% 6.5%

Average renter income in Arnold

To get a better sense of what renters earn on average in Arnold, their median household income was $49,103 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 27.2%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$49,103
Rent-to-income ratio
27.2%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Arnold

Workforce and job types in Arnold

The job market in Arnold is powered by 10,796 working residents, spread across a range of industries and roles. 75% of the working population are employed in professional or administrative positions, while 25% are in hands-on or service-based jobs. Also, 7.6% run their own businesses, 66.7% are employed by private companies, and 10.6% work in the public sector.

Workforce demographics

Working population
10,796
0.4% year-over-year change
White collar
8,098
Blue collar
2,698
Value Percent YoY change
White collar 8,098 75% 2.3%
Blue collar 2,698 25% -5.1%
Employer type
Self employees
7.6%
Private companies
66.7%
Governmental workers
10.6%
Not for profit companies
15.1%
Value Percent YoY change
Self employees 815 7.6% 11.9%
Private companies 7,205 66.7% -2.6%
Governmental workers 1,147 10.6% -9.9%
Not for profit companies 1,629 15.1% 19.6%
Unemployment rate
2.8%
-34.0% year-over-year change

Available workforce

The unemployment rate in Arnold stands at 2.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Arnold

How people get around in Arnold

In Arnold, the average commute time is 27 minutes. Commuting methods vary: 91% of residents travel by personal vehicle and 0.6% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
27 min
Means of transportation
Value Percent YoY change
Car 9,839 91% 0.7%
Walk 63 0.6% -12.5%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Arnold by zipcode?

Zipcode Population Number of households Median income Average income
63010 34,478 13,885 $79,784 $92,383

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FAQs about Arnold demographics 

What is the total population of Arnold?

Arnold has a total population of 20,956 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.3% compared to a year ago.

What is the gender ratio in Arnold?

The gender ratio in Arnold is as follows:
  • 48.5% males (10,161 residents)
  • 51.5% females (10,795 residents)

What is the median age in Arnold?

The median age in Arnold is 39.7.

What is the age distribution of the population in Arnold?

The age distribution in Arnold is as follows:
  • Under 15: 16.1% (3,382 residents)
  • Ages 15-24: 9.9% (2,076 residents)
  • Ages 25-44: 28.8% (6,042 residents)
  • Ages 45-64: 25.7% (5,378 residents)
  • Over 65: 19.5% (4,078 residents)

What is the racial and ethnic makeup of Arnold?

The racial and ethnic makeup of Arnold is as follows:
  • White: 88.9% (18,633 residents)
  • Black or African American: 0.2% (52 residents)
  • American Indian and Alaska Native: 0% (7 residents)
  • Asian: 1.8% (380 residents)
  • Native Hawaiian and Other Pacific Islander: 0.1% (14 residents)
  • Two or More Races: 8.4% (1,754 residents)
  • Other: 0.6% (116 residents)

What percentage of the population in Arnold are U.S.-born citizens?

U.S.-born citizens represent 94% of the population in Arnold.

How many housing units are there in Arnold?

There are 8,982 housing units in Arnold, reflecting a -2.4% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Arnold and what is the average household size?

Arnold has a total of 8,394 households, with an average of 2 people in each.

What is the median household income in Arnold?

Arnold has a median household income of $78,370, representing a +4.2% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Arnold?

The employment rate is 97.2% in Arnold, with a workforce of 10,796 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 75% (8,098 residents)
  • Blue-collar workers: 25% (2,698 residents)

Places of employment:
  • Self-employed: 7.6% (815 residents)
  • Private companies: 66.7% (7,205 residents)
  • Governmental workers: 10.6% (1,147 residents)
  • Not-for-profit companies: 15.1% (1,629 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025