I hope you find the links below helpful.  It is a comprehensive directory of the State of Illinois and different towns, cities, villages, counties and more.

State Home Page  

• State of Illinois

State Directory

• Find-It! Illinois
• State Telephone Directory

Statewide Offices

• Governor
• Lt. Governor
• Attorney General
• Auditor General
• Secretary of State: Illinois Gateway
• State Comptroller
• State Comptroller's Information Warehouse
• State Treasurer

Legislative Branch

• Illinois General Assembly
• Legislative Information

Judicial Branch

• Supreme and Appellate Courts Opinions

Executive Branch

• Bureau of the Budget
• Department of Agriculture
• Department of Central Management Services
• Department of Children and Family Services
• Department of Commerce and Community Affairs
• Department of Corrections
• Department of Employment Security
• Department of Financial Institutions
• Department of Human Rights
• Department of Human Services
• Department of Insurance
• Department of Labor
• Department of Lottery
• Department of Natural Resources
• Department of Nuclear Safety
• Department of Professional Regulation
• Department of Public Aid
• Department of Public Health
• Department of Revenue
• Department of Transportation
• Department of Veterans' Affairs
• Department on Aging
• Emergency Management Agency
• Environmental Protection Agency
• Historic Preservation Agency
• Illinois Criminal Justice Information Authority
• Illinois FIRST - Fund for Infrastructure, Roads, Schools and Transit
• Illinois Guardianship and Advocacy Commission
• Illinois Housing Development Authority
• Illinois State Fair
• Illinois State Fire Marshal
• Illinois State Geological Survey
• Illinois State Police
• Illinois Tollway
• Office of Banks and Real Estate
• State Library
• State Museum

Boards and Commissions

• Board of Elections
• Capital Development Board
• Community College Board
• Illinois Arts Council
• Illinois Commerce Commission
• Illinois Liquor Control Commission
• Illinois Pollution Control Board
• Illinois Student Assistance Commission
• Property Tax Appeal Board
• State Board of Education

Regional

• Champaign-Urbana Mass Transit District
• Chicago Transit Authority - CTA
• Northeastern Illinois Planning Commission
• Northwest Municipal Conference
• Southeastern Illinois Regional Planning
• Tri-County Regional Planning Commission

County

City

Town

• Normal

Township

Villlage

Other

• Illinois City/County Management Association
• Illinois Municipal League
• Township Officials of Illinois
• United Counties Council of Illinois

Libraries

• LibCat list of libraries in Illinois