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ZIP Code 63123
Affton, MO, St. Louis County
Population
49,077
Land area
12.5sq mi
People per sq mi
3,941
City
Affton
ZIP 63123 and nearby ZIP codes
ZIP 63123 at a glance
- ZIP 63123 (Affton) is about 44 times as dense as Missouri as a whole.
- Households here earn a median of $77,055 a year, 9% more than the Missouri figure of $70,702.
- A typical owner-occupied home is valued at $219,400 (5% below Missouri) and median rent is $1,006 a month.
Local data for ZIP 63123
Counts from official public data
Housing and community stats
ZIP 63123, American Community Survey 2020-2024
Median household income
$77,055
Poverty rate
7.9%
Median home value
$219,400
Prices +3.5% in a year
Median rent
$1,006/mo
Homeownership
74.9%
Bachelor's or higher
37.6%
Median age
40.9
Average commute
23.7 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
915
ZIP Business Patterns 2023
Employees
13,475
$768M annual payroll
PPP loans
$136M
1,245 loans
Campaign donations
$149K
23% D, 24% R, 2026 cycle
Environment and hazard risk
ZIP 63123, from FEMA, NOAA and EPA
Natural hazard risk
Relatively High
Top: heat wave
Storm events since 1996
1,321
Countywide, mostly hail
Flood insurance policies
2,070
0.6% of homes, county
July high / Jan low
90° / 25°F
43.9 inches of rain a year
Health statistics
Share of adults in ZIP 63123, CDC PLACES estimates
Obesity
29.7%
U.S. 33.3% -3.6 pts
Diabetes
10.3%
U.S. 12.1% -1.8 pts
Smoking
14.5%
U.S. 12.8% +1.7 pts
Uninsured (18-64)
7.2%
U.S. 11.1% -3.9 pts
Cities in ZIP 63123
ZIP codes near 63123
| Name | Distance | Land area (sq mi) |
|---|---|---|
| 63125Mehlville | 2.5 mi | 9.9 |
| 63109St. Louis | 2.8 mi | 3.5 |
| 63119Webster Groves | 3 mi | 8.4 |
| 63126Crestwood | 3.1 mi | 4.6 |
| 63111St. Louis | 3.9 mi | 3.2 |
| 63116St. Louis | 4 mi | 5.4 |
| 63143Maplewood | 4.2 mi | 2 |
| 63139St. Louis | 4.7 mi | 3.8 |
| 62240East Carondelet | 4.8 mi | 14.9 |
| 63127Sunset Hills | 4.8 mi | 5.8 |
| 63144Brentwood | 5 mi | 2.3 |
| 63128Sappington | 5.1 mi | 15.6 |
Frequently asked questions
- What city is ZIP code 63123?
- ZIP code 63123 is in Affton, MO (St. Louis County).
- What county is ZIP code 63123 in?
- ZIP code 63123 is mostly in St. Louis County, Missouri.
- How many people live in ZIP code 63123?
- About 49,077 people live in the 63123 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.