| ZIP Codes: | 37 ZIP Codes (20 Standard, 10 PO Box, 7 Unique) [See All] |
| Area Codes: | 314 / 557 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:54:04 PM |
| Population: | 279,896 [See All] |
| FIPS: | 29510 |
| CBSA: | St. Louis, MO-IL |
| Land Area: | 62 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 38.6291, -90.2247 |
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279,896 residents live across 37 ZIPs covering 62 sq mi, served by 1 distinct USPS-recognized cities.
Population moved from 308,483 to 279,896 from 2014 to 2024 — a -9.3% change. 5 ZIPs gained residents, 13 lost (and 1 held flat).
The county's wealthiest ZIP 63110 (Saint Louis, $81,655 median) and poorest ZIP 63106 (Saint Louis, $20,679) are 3.2 miles apart — a 3.9× income gap across local geography.
Median home values vary 7.0× across this county — from $53,500 in 63120 (Saint Louis) to $372,200 in 63108 (Saint Louis).
Density varies 8× across the county — from 1,186 people/sq mi in 63147 (Saint Louis) to 9,156 in 63108 (Saint Louis).
Most of the decade's growth concentrated around Saint Louis — top growth ZIPs averaged +23.0% over the past ten years ( 63103 , 63102 and 63101 ).
Educational attainment ranges from 10.1% bachelor's+ in 63120 (Saint Louis) to 64.9% in 63110 (Saint Louis) — the breadth of educational profiles across the area.
Within Missouri, this is the #5 most populous of 116 counties and ranks #94 for median household income .
On the national stage, Saint Louis City County is .
Hosts 4 single-entity Unique ZIPs: 63150Bank Of America ; 63164Saint Louis ; 63199Usps Inspection Service ; and 63160Bank Of America .
Weighted by population, the typical household earns about $56,569 across the county — reflecting what a typical resident sees, not a simple ZIP average.
41.1% of adults age 25+ hold a bachelor's degree or higher (84,045 of 204,501 reporting). The most-educated ZIPs cluster around Saint Louis.
20 Standard delivery, 10 PO Box only, 7 single-entity Unique ZIPs serve this county.
2 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
7 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 3.9× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
Saint Louis City County lost 9.3% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 63116 | Saint Louis | Standard | 42,170 | $61,433 | 5.7 | -5.5% |
| 63118 | Saint Louis | Standard | 25,913 | $57,762 | 3.6 | -9.8% |
| 63109 | Saint Louis | Standard | 25,236 | $69,938 | 3.4 | -7.9% |
| 63139 | Saint Louis | Standard | 21,631 | $75,757 | 4.1 | -2.0% |
| 63108 | Saint Louis | Standard | 21,336 | $55,147 | 2.3 | 2.8% |
| 63104 | Saint Louis | Standard | 19,007 | $68,764 | 3.8 | -1.4% |
| 63111 | Saint Louis | Standard | 18,851 | $47,039 | 3.9 | -11.5% |
| 63112 | Saint Louis | Standard | 17,985 | $45,542 | 3.1 | -10.9% |
| 63110 | Saint Louis | Standard | 17,645 | $81,655 | 6.2 | 5.0% |
| 63115 | Saint Louis | Standard | 14,488 | $30,622 | 3.4 | -29.4% |
| 63113 | Saint Louis | Standard | 10,221 | $39,913 | 2.6 | -14.0% |
| 63107 | Saint Louis | Standard | 8,909 | $43,625 | 2.4 | -24.0% |
| 63103 | Saint Louis | Standard | 8,778 | $40,943 | 2.2 | 26.8% |
| 63147 | Saint Louis | Standard | 8,173 | $41,182 | 6.9 | -19.4% |
| 63120 | Saint Louis | Standard | 6,790 | $35,176 | 3.2 | -26.2% |
| 63106 | Saint Louis | Standard | 6,751 | $20,679 | 2.3 | -43.7% |
| 63101 | Saint Louis | Standard | 3,130 | $66,678 | 0.4 | 16.4% |
| 63102 | Saint Louis | Standard | 2,882 | $65,527 | 1.9 | 25.8% |
| 63155 | Saint Louis | Standard | 0 | — | 0.0 | — |
| 63156 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63169 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63188 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63164 | Saint Louis | Unique | — | — | 0.0 | — |
| 63199 | Saint Louis | Unique | — | — | 0.0 | — |
| 63150 | Saint Louis | Unique | — | — | 0.0 | — |
| 63160 | Saint Louis | Unique | — | — | 0.0 | — |
| 63197 | Saint Louis | Unique | — | — | 0.0 | — |
| 63195 | Saint Louis | Unique | — | — | 0.0 | — |
| 63171 | Saint Louis | Unique | — | — | 0.0 | — |
| 63179 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63177 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63178 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63166 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63180 | Saint Louis | Standard | — | — | 0.0 | — |
| 63163 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63157 | Saint Louis | PO Box | — | — | 0.0 | — |
| 63158 | Saint Louis | PO Box | — | — | 0.0 | — |