Franklin County IL United States
| County FIPS | 17055 |
| Largest City | West Frankfort |
| State | Illinois |
| Latitude | 37.9923 |
| Longitude | -88.9242 |
| Population | 37,323 |
| Density | 91.3 people per square mile |
| Time Zone | America/Chicago |
Median household: $56,740
Median individual: $31,967
Mode: 94.7% White
Median house value: $93,587.0
Median: 43.4 years old
With at least college degree: 15.8%
With STEM degree: 41.8%
Never married: 24.7%
Unemployed: 7.7%
All data comes from the SimpleMaps US Counties Database, 2026.
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