Sullivan County, established in the year 1845, was given the name after John Sullivan, the Major General of the American Revolutionary War. It has the county seat and the largest city in Milan. It has a total area of 651.43 sq mi and has over 6.7K people with an advanced amalgamation of races including White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others along with more than 2.9K households and 1.9K families. The County is situated in the north central part of Missouri.

Today obtaining records from the Sullivan County data site on obituary notice, real estate and property facts, World War I and II information, marriage and divorce details, American Civil War history, marriage volume number, origin and birth details, war and enlistment data, burial and cemetery details, last will, census data, land and estate data, probate essentials, civil court case lookups, demise details, immigration and naturalization specifics and the likes has become a matter of ease with the help of its simple technical designs and user- friendly navigational procedures.