Formed in the year 1816, Monroe County, Illinois has a total area of 398.04 sq mi. It has derived its name from the James Monroe, the fifth President of the United States. Waterloo is the county seat of Monroe. A population of over 32.9K with a racial makeup including White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others with more than 10.2K households and 7.7K families dwell here. It is located in the southern portion of the state of Illinois, usually known as "Little Egypt" with Columbia as the largest municipality.

The widest range of lineal information from Monroe County records library encompasses civil court proceedings, land assessment records, census data, ancestral Social Security Numbers, immigration and naturalization minutes, birth and origin history, marital status and divorce decree, death and obituary reports, last will, probates and liens figures, military service and employment details that vastly enrich the online genealogical studies and immense historical investigations instantly!