Language
English is the main language spoken in Illinois though in Chicago it’s not uncommon to hear other languages like Spanish.
Currency
The US dollar is the only currency accepted in Illinois though credit cards are widely used at virtually every business. ATMs and banks are found in even the smallest towns, and are the best places to exchange foreign currency. Travelers’ checks in US dollars can be used as cash in most large stores.
Time
Illinois is in Central Standard Time (CST). GMT -6 (GMT -5 from March 12 to November 4).
Electricity
Electricity is 110V, 60Hz. Flat, two-prong plugs are the most common in Illinois.
Communications
The international direct dialing code for the United States is +1. Illinois has several area codes, including 312 (Chicago), 217, 224, 309, 618, 630, 708, 773, 815, and 847. Excellent mobile phone coverage is available throughout the state.
Duty-free
Visitors to Illinois do not need to pay any duty tax on one liter of alcohol and 200 cigarettes (or 50 non-Cuban cigars or two kilograms of tobacco)
Consulates in Illinois
Canadian Consulate General: +1-312-616-1860 (Chicago) British Consulate General: +1-312-970-3800 (Chicago) Australian Consulate General: +1-312-541-0414 (Chicago)
Emergency services
Emergency services: 911