County ProfileMO
St. Louis County
Population: 1,004,125 · 89 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
1,004,125
People
Median age
40.3
Housing
Total households
413,849
Income
Median household income
$82,936
Housing
Total housing units
446,192
Employment
Employment rate
62.1%
Education
Bachelor’s degree or higher
47.4%
Healthcare
Insured population
94.3%
County details
Local time 02:02:04(CT)| Name | St. Louis |
|---|---|
| Total ZIP codes | 89total |
| ZIP codes (by type) | 64 Standard16 PO Box9 Unique |
| Area code | 314, 557, 636 |
| Timezone | Central Time (CT) |
| Coordinates | 38.6404382, -90.4454969 |
| Land area | 508.5 sq miles(1,317.1 km²) |
Map of St. Louis county, Missouri with ZIP codes
Cities and Communities in St. Louis County
Compare the largest cities in St. Louis County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Saint Louis | 301,578 | $56,160 | 67ZIPs |
| Florissant | 52,533 | $65,318 | 4ZIPs |
| Chesterfield | 49,999 | $133,037 | 3ZIPs |
| Wildwood | 35,417 | $161,060 | 2ZIPs |
| Ballwin | 31,103 | $124,626 | 4ZIPs |
| Maryland Heights | 28,284 | $86,436 | 1ZIPs |
| Hazelwood | 25,458 | $55,908 | 1ZIPs |
| Saint Ann | 13,019 | $52,323 | 1ZIPs |
| Eureka | 11,646 | $108,394 | 1ZIPs |
| Bridgeton | 11,445 | $72,005 | 1ZIPs |
| Valley Park | 6,885 | $67,898 | 1ZIPs |
| Fenton | 3,989 | $101,000 | 2ZIPs |
| Earth City | 7 | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in St. Louis County
Review the most populated postal areas across St. Louis County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 63021 | Ballwin | $120,177 | 56,680 |
| 63129 | Saint Louis | $94,888 | 53,432 |
| 63123 | Saint Louis | $77,055 | 50,989 |
| 63031 | Florissant | $70,811 | 47,609 |
| 63026 | Fenton | $97,553 | 44,648 |
| 63033 | Florissant | $66,776 | 43,175 |
| 63017 | Chesterfield | $127,095 | 42,773 |
| 63116 | Saint Louis | $61,433 | 41,959 |
| 63136 | Saint Louis | $41,154 | 41,767 |
| 63122 | Saint Louis | $136,385 | 41,319 |
| 63011 | Ballwin | $124,454 | 37,495 |
| 63114 | Saint Louis | $55,870 | 35,237 |
| 63119 | Saint Louis | $106,183 | 34,793 |
| 63125 | Saint Louis | $61,624 | 32,816 |
| 63146 | Saint Louis | $84,756 | 31,459 |
| 63128 | Saint Louis | $92,359 | 29,728 |
| 63130 | Saint Louis | $85,823 | 29,454 |
| 63109 | Saint Louis | $69,938 | 26,777 |
| 63118 | Saint Louis | $57,762 | 25,194 |
| 63108 | Saint Louis | $55,147 | 23,603 |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS