St. Louis County MO United States
| County FIPS | 29189 |
| Largest City | Florissant |
| State | Missouri |
| Latitude | 38.6407 |
| Longitude | -90.4434 |
| Population | 995,569 |
| Density | 1960.31 people per square mile |
| Time Zone | America/Chicago |
Median household: $82,936
Median individual: $45,233
Mode: 62.1% White
Median house value: $276,344.0
Median: 40.3 years old
With at least college degree: 47.4%
With STEM degree: 43.9%
Never married: 34.3%
Unemployed: 4.3%
All data comes from the SimpleMaps US Counties Database, 2026.
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