Named in the favor of the George Mason, the county has more than 14.6K people with a racial makeup including White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others with over 6.3K households and 4.5K families. Havana is the county seat and the largest city. The total area of the Mason County is 563.46 sq mi which was established in 1841.

Vital, genealogical and legal aspects are now sufficiently resolved with the Mason County records site by obtaining information related to birth and death details, marriage volume numbers, divorce verdict information, ancestral Social Security Numbers, civil court proceedings and details about adoption and adoptees, land registration deeds, will and estate records search depicts a clear picture of the ownership, distribution and management of real estate, ranch, residence, property domain and assets, military or martial service records, American Civil War and World War I & II information without any exasperation.