St. Louis County, Missouri
43 ZIP codes · 507.99 sq mi of land · FIPS 29189
| Population | 995,569 |
|---|---|
| State | Missouri |
| FIPS code | 29189 |
| Time zone | Central |
| Land area | 507.99 sq mi |
| Center (lat, long) | 38.6407, -90.4461 |
Area codes in this area
These are the area codes that most often serve St. Louis County (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Cities and towns (largest first)
Florissant · 51,773Chesterfield · 49,574Ballwin · 31,279Maryland Heights · 27,880Hazelwood · 25,114EurekaGlencoeGroverBridgetonEarth CitySaint AnnValley ParkSaint Louis
ZIP codes in St. Louis County
63005 Chesterfield63011 Ballwin63017 Chesterfield63021 Ballwin63025 Eureka63031 Florissant63033 Florissant63034 Florissant63038 Glencoe63040 Grover63042 Hazelwood63043 Maryland Heights63044 Bridgeton63045 Earth City63074 Saint Ann63088 Valley Park63105 Saint Louis63114 Saint Louis63117 Saint Louis63119 Saint Louis63121 Saint Louis63122 Saint Louis63123 Saint Louis63124 Saint Louis63125 Saint Louis63126 Saint Louis63127 Saint Louis63128 Saint Louis63129 Saint Louis63130 Saint Louis63131 Saint Louis63132 Saint Louis63133 Saint Louis63134 Saint Louis63135 Saint Louis63136 Saint Louis63137 Saint Louis63138 Saint Louis63140 Saint Louis63141 Saint Louis63143 Saint Louis63144 Saint Louis63146 Saint Louis
Population: U.S. Census Bureau, ACS 5-year estimates, 2024.