Founded in the year 1826, McDonough County was named after Commodore Thomas Macdonough, commander of American naval forces at the Battle of Plattsburgh. The county seat and the largest municipality is Macomb. Over 32.6K population with more than 12.3K with a racial makeup including White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others housing units and 7K families reside here. The county is comprised of a total area of 590 sq mi approximately. The entire McDonough County is included in the Macomb Micropolitan Statistical Area.

The county records index of the McDonough County, IL is definitely a considerable source that serves as the basic supply of fundamental facts on marriage and divorce details, marriage volume number, obituary notice, American Civil War history, real origin and birth details, census data, World War I and II information, immigration and naturalization specifics, estate and property facts, demise facts and the other important issues.