| Capital of Illinois |
Springfield |
| Population of Illinois |
Approximately 13.2 million |
| Language of Illinois |
English |
| Currency of Illinois |
US Dollar (USD) |
| Electricity of Illinios |
120 Volts at 60 Hertz |
| Area Code of Illinios |
Illinois has 11 area codes |
| Time Zone of Illinios |
GMT - 6 and GMT - 5 |
| Admission to the Union | December 3, 1818 |
