Stephenson County IL United States
| County FIPS | 17177 |
| Largest City | Freeport |
| State | Illinois |
| Latitude | 42.3518 |
| Longitude | -89.6623 |
| Population | 43,768 |
| Density | 77.59 people per square mile |
| Time Zone | America/Chicago |
Median household: $64,043
Median individual: $36,672
Mode: 79.6% White
Median house value: $134,387.0
Median: 45.3 years old
With at least college degree: 20.7%
With STEM degree: 39.5%
Never married: 29.9%
Unemployed: 4.3%
All data comes from the SimpleMaps US Counties Database, 2026.
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