- Mason County Genealogy Trails
- Provides genealogical and historical data including cemeteries, gallery, obituaries and historical resources.
- Mason County Michigan
- Official government site, includes information on the county board, departments, event calendar, and public records.
- Mason County Plat
- A detailed, interactive plat map of the county and its cities and towns in PDF format.
- National Association of Counties: Mason County, MI
- Information about the county elected officials, population, demographic data, and census facts.
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