Menard County IL United States
| County FIPS | 17129 |
| Largest City | Petersburg |
| State | Illinois |
| Latitude | 40.0274 |
| Longitude | -89.8022 |
| Population | 12,095 |
| Density | 38.47 people per square mile |
| Time Zone | America/Chicago |
Median household: $82,176
Median individual: $45,216
Mode: 94.8% White
Median house value: $186,636.0
Median: 42.8 years old
With at least college degree: 28.3%
With STEM degree: 36.4%
Never married: 22.5%
Unemployed: 3.5%
All data comes from the SimpleMaps US Counties Database, 2026.
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