Illinois is a state in the Midwestern region of the United States. It has the fifth largest gross domestic product (GDP), the sixth largest population, and the 25th largest land area of all U.S. states. Illinois has been noted as a microcosm of the entire United States. With Chicago in northeastern Illinois, small industrial cities and immense agricultural productivity in the north and center of the state, and natural resources such as coal, timber, and petroleum in the south, Illinois has a diverse economic base, and is a major transportation hub. small industrial cities and immense agricultural productivity in the north and center of the state, and natural resources such as coal, timber, and petroleum in the south, Illinois has a diverse economic base, and is a major transportation hub. 

Among instrument makers of note in Illinois are George Washburn Lyon and Patrick Healy who began a partnership in Chicago, Illinois back before the Civil War.  The formed Washburn company has been building stringed instruments since 1883.  Now an American institution, the Washburn company continues to build guitars, mandolins, banjos, and ukuleles.

Resource:  Washburn Guitars