Illinois.gov

Great site to get any kind of information about the state of Illinois.

State of the United States. Official site, trustworthy.

The web site is trustworthy. Cannot say the same for the organization behind it 🙁

Be careful of doing business with the State of Illinois – they have driven many, many small businesses out of business by not paying in a timely manner. There has been much recent publicity on this. But this practice, and the resulting bankruptcies, has been going on for years and years.