There are 75 Alteration Services in Illinois, serving a population of 12,854,526 people in an area of 55,505 square miles. There is 1 Alteration Service per 171,393 people, and 1 Alteration Service per 740 square miles.
The state of Illinois is ranked 47th in Alteration Services per capita, and 25th in Alteration Services per square mile.