sentences:  Its county seat is Carmi.It is located in the southern portion of Illinois known locally as "Little Egypt".White County was organized from Gallatin County in 1815, and was named after Captain Leonard White (some accounts say Captain Isaac White), a Gallatin County legislator who is credited with the idea of extending the Illinois-Wisconsin border a few miles north of the southern tip of Lake Michigan and was also in charge of the salt works at Equality.