Mason County is a district of Illinois.
Boundaries: United States Census Bureau, MAF/TIGER Database (https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html) via geoBoundaries, public domain
| Township of Allens Grove | no seat recorded | |
| Township of Bath | no seat recorded | |
| Township of Crane Creek | no seat recorded | |
| Township of Forest City | no seat recorded | |
| Township of Havana | Havana | |
| Township of Kilbourne | no seat recorded | |
| Township of Lynchburg | no seat recorded | |
| Township of Manito | no seat recorded | |
| Township of Mason City | no seat recorded | |
| Township of Pennsylvania | no seat recorded | |
| Township of Quiver | no seat recorded | |
| Township of Salt Creek | no seat recorded | |
| Township of Sherman | no seat recorded |
Nothing has been written about Mason County here, and neither Wikipedia nor Wikivoyage has an article we could draw one from. If you know the place, that makes you a better source than anything we have. Tell us what is worth knowing and where you got it.
We show Havana as the capital of Mason County. If that is wrong, tell us what it should be and where you read it.
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