McDonough County, Illinois
McDonough County forms a perfect square on the Mercator map projection.
The largest city in the county, Macomb, is also the County seat.
Macomb is located in the center of county, with the courthouse almost precisely in the center of McDonough County.
McDonough County was founded in 1826.
McDonough County is named in honor of Thomas Macdonough, who defeated a British squadron in the decisive naval Battle of Lake Champlain in the War of 1812.
Bushnell, Colchester, Macomb
Bardolph, Blandinsville, Good Hope, Industry, Prairie City, Sciota, Tennessee
Bethel Township, Blandinsville Township, Bushnell Township, Chalmers Township, Colchester Township, Eldorado Township, Emmet Township, Hire Township, Industry Township, Lamoine Township, Macomb Township, Macomb City Township, Mound Township, New Salem Township, Prairie City Township, Sciota Township, Scotland Township, Tennessee Township, Walnut Grove Township