Affton, MO ZIP Codes
One ZIP code serves Affton, Missouri: 63123. Together they are home to 49,077 residents in 21,755 households. That is more than the 19,052 people counted inside Affton Census-designated place, because these ZIP codes reach past its boundary.
Affton Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 19,052 |
| Households | 8,695 |
| Median household income | $79,539 |
| Median home value | $212,400 |
| Median age | 42 |
| Median rent | $1,015 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 49,077 |
| Households (sum of ZIP codes) | 21,755 |
| Median household income, range across ZIP codes | $77,055 (63123) to $77,055 (63123) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $77,055 |
| Homeowners | 74.9% |
| Households with kids under 18 | 23.3% |
| Moved in the past year | 10.3% |
| Carrier routes in EDDM2GO's route library | 45 routes, 22,718 homes (1 of 1 ZIP codes) |
Every ZIP code in Affton
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 63123 | Saint Louis | 49,077 | 21,755 | $77,055 | $219,400 | 74.9% | 23.3% | 10.3% | 45 | 23,665 | 37% of its land |
A ZIP code is listed for Affton when at least 10% of its land lies inside the Affton Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Affton. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Affton.
Counties
- St. Louis County — 46 ZIP codes
Nearby cities sharing these ZIP codes
Price a mailing to Affton ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Affton, MO?
- 63123. A ZIP code is listed for Affton when at least 10% of its land lies inside the Affton Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Affton.
- What is the population of Affton, MO?
- The Census Bureau counts 19,052 residents inside Affton Census-designated place (ACS 2020–2024). The 1 ZIP code that serve Affton hold 49,077 residents in all.
- What is the median household income in Affton, MO?
- $79,539 inside Affton Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $77,055 to $77,055.
- How many carrier routes and mailboxes are in Affton, MO?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 45 carrier routes reaching 22,718 residential and 933 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.