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Arnold, MO
City in Jefferson County, Missouri. ZIP codes: 63010.
Population
20,956
Land area
11.5sq mi
People per sq mi
1,818
ZIP codes
1
Arnold and its ZIP codes
Arnold at a glance
- Arnold is about 20 times as dense as Missouri as a whole.
- By population, it ranks 36th among 1,062 cities and towns in Missouri.
- The median household income is $78,370, 11% above the Missouri median of $70,702.
- A typical owner-occupied home is valued at $220,000 (4% below Missouri) and median rent is $1,112 a month.
Local data for Arnold, MO
Counts from official public data
Housing and community stats
Arnold, MO, American Community Survey 2020-2024
Median household income
$78,370
Poverty rate
8.2%
Median home value
$220,000
Median rent
$1,112/mo
Homeownership
79.8%
Bachelor's or higher
25.4%
Median age
39.7
Average commute
27.2 min
Largest reported origins and ancestries: German Americans (5,515), Irish Americans (2,595), Italian Americans (886).
Economy and federal money
Jobs, pay, income and spending are for Jefferson County. PPP loans are for Arnold.
Unemployment rate
3.6%
Aug 2026, -0.2 pts in a year
Average annual pay
$52,302
49,584 jobs, 2025
Income per person
$56,907
BEA, 2024
Federal spending
$1.45B
FY 2026, $6,386 per person
PPP loans
$60.6M
834 loans, 6,457 jobs reported
How people get to work
Arnold, MO, workers 16 and older. American Community Survey 5-year estimates
- Drove alone84.8%
- Carpooled6.2%
- Public transit0.0%
- Walked0.6%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.3%
- Worked from home8.1%
Average one-way commute: 27.2 minutes for people who do not work from home.
Environment and hazard risk
Arnold, MO, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Moderate
Top: strong wind
Storm events since 1996
664
Countywide, mostly hail
Flood insurance policies
591
0.7% of homes, county
July high / Jan low
88° / 22°F
43.6 inches of rain a year
Health statistics
Share of adults in Arnold, MO, CDC PLACES estimates
Obesity
39.4%
U.S. 33.3% +6.1 pts
Diabetes
11.1%
U.S. 12.1% -1.0 pts
Smoking
15.7%
U.S. 12.8% +2.9 pts
Uninsured (18-64)
7.7%
U.S. 11.1% -3.4 pts
ZIP codes in Arnold
1 in or overlapping Arnold. Population shown
Cities near Arnold
| Name | Distance | Land area (sq mi) |
|---|---|---|
| OakvilleCensus-designated place | 3.5 mi | 15.9 |
| ImperialCensus-designated place | 3.9 mi | 5.2 |
| KimmswickCity | 4 mi | 0.2 |
| BarnhartCensus-designated place | 5.9 mi | 5 |
| MehlvilleCensus-designated place | 6.5 mi | 7.5 |
| ConcordCensus-designated place | 6.6 mi | 5.5 |
| SappingtonCensus-designated place | 7 mi | 2.4 |
| Green ParkCity | 7.3 mi | 1.3 |
| MurphyCensus-designated place | 7.6 mi | 3.9 |
| Sunset HillsCity | 7.8 mi | 9 |
| LakeshireCity | 8.3 mi | 0.2 |
| FentonCity | 8.5 mi | 6.3 |
| St. GeorgeCensus-designated place | 8.7 mi | 0.2 |
| AfftonCensus-designated place | 9 mi | 4.6 |
| Grantwood VillageTown | 9 mi | 0.8 |
| LemayCensus-designated place | 9 mi | 4.1 |
Frequently asked questions
- What county is Arnold, MO in?
- Arnold is in Jefferson County, Missouri.
- What ZIP codes are in Arnold, MO?
- ZIP codes in or overlapping Arnold include 63010.
- What is the population of Arnold, MO?
- About 20,956 people live in Arnold, based on American Community Survey 5-year estimates.
- What cities are near Arnold?
- Nearby places include Oakville (3.5 mi), Imperial (3.9 mi), Kimmswick (4 mi), Barnhart (5.9 mi), Mehlville (6.5 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023