ZIP code 63121: Saint Louis, MO
63121 is a ZIP code in Saint Louis, Missouri, mainly in St. Louis County, part of the St. Louis, MO-IL metro area. About 25,008 people live here.
- Population
- 25,008
- Median household income
- $42,701
- Typical home value
- $90,500-0.4% in 12 months
- Median rent
- $985gross, per month
- Median age
- 33.2
- Homeowners
- 51.6%of occupied homes
Shaded: ZIP code 63121's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 63121 details
| City | Saint Louis |
|---|---|
| State | Missouri |
| County | St. Louis County |
| Metro area | St. Louis, MO-IL |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 6.8 sq mi |
| Population density | 3,694 people per sq mi |
| Bachelor's degree or higher | 24.2% of adults 25+ |
| Average commute | 23.8 minutes |
| Center coordinates | 38.70806, -90.30063 |
Median rent in 63121 by bedrooms
| Size | Median gross rent |
|---|---|
| Studio | $797/mo |
| 1 bedroom | $785/mo |
| 2 bedrooms | $1,031/mo |
| 3 bedrooms | $1,141/mo |
| 4 bedrooms | $1,175/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 63121
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 63133 | Saint Louis, MO | 1.8 mi | 6,569 |
| 63120 | Saint Louis, MO | 2.4 mi | 6,790 |
| 63140 | Saint Louis, MO | 2.5 mi | 316 |
| 63135 | Saint Louis, MO | 3.0 mi | 18,381 |
| 63130 | Saint Louis, MO | 3.3 mi | 28,910 |
| 63134 | Saint Louis, MO | 3.3 mi | 13,059 |
| 63136 | Saint Louis, MO | 3.4 mi | 40,929 |
| 63114 | Saint Louis, MO | 3.4 mi | 33,969 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 63121?
A typical home in ZIP code 63121 is worth about $90,500 (Zillow Home Value Index). The median household here earns $42,701 a year. See what buying here would cost per month, with Missouri average taxes and insurance filled in.
Monthly payment for a $90,500 homeWhat can a $42,701 income afford?Rental property numbers
About ZIP code 63121
What city is ZIP code 63121?
ZIP code 63121 is in Saint Louis, MO, in St. Louis County.
What county is ZIP code 63121 in?
63121 is mainly in St. Louis County, Missouri.
What is the population of ZIP code 63121?
About 25,008 people live in ZIP code 63121, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 63121 in?
63121 is in Central Time (UTC−6). It observes daylight saving time.
What other ZIP codes does Saint Louis have?
Saint Louis, MO also uses 63101, 63102, 63103, 63104, 63105, 63106, 63107, 63108, 63109, 63110, 63111, 63112, 63113, 63114, 63115, 63116, 63117, 63118, 63119, 63120, 63122, 63123, 63124, 63125, 63126, 63127, 63128, 63129, 63130, 63131, 63132, 63133, 63134, 63135, 63136, 63137, 63138, 63139, 63140, 63141, 63143, 63144, 63145, 63146, 63147, 63150, 63151, 63155, 63156, 63157, 63158, 63160, 63163, 63164, 63166, 63167, 63169, 63171, 63177, 63178, 63179, 63180, 63182, 63188, 63195, 63197 and 63199.