| Name | Johnson County |
| Place Type | County |
| Located in | Illinois, United States |
| Coordinates (lat, lon) | 37.4500514, -88.8667311 |
| Population | 11,347 |
| Elevation | 118 m |
| USGS GNIS FeatureID | 424245 |
| Histopolis Place ID | 541419855 |
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| Border Colors: | Johnson County | Illinois |
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9 Townships, 17 Precincts (Precinct is assumed unless noted)
2 Cities, 6 Villages, 29 Unincorporated Places (u.p.) (Unincoporated Place (u.p.) is assumed unless noted)