Illinois became the 21st state on December 3, 1818. Civic life here often turns on the relationship between Chicago, suburban counties, downstate cities, farm communities, manufacturing regions, universities, and transportation corridors that connect the Midwest. Public decisions about budgets, pensions, schools, transit, public safety, health care, and economic development can look very different across those regions. This profile helps readers understand Illinois representation and state government resources as part of a state where local needs, statewide systems, and national politics often intersect.

State Governor J.B. Pritzker (Democratic)
State Population 12.72 million
State U.S. Senators 2 U.S. Senators
State U.S. House Members 17 U.S. House members

U.S. Senators

Democrat
Democrat

U.S. House Members

District 1Democrat
District 2Democrat
District 3Democrat
District 4Democrat
District 5Democrat
District 6Democrat
District 7Democrat
District 8Democrat
District 9Democrat
District 10Democrat
District 11Democrat
District 12Republican
District 13Democrat
District 14Democrat
District 15Republican
District 16Republican
District 17Democrat

How This state government works

This state government works through executive agencies, the state legislature, and state courts. Use this tab to choose the right path: agencies for services, the legislature for bills and hearings, and courts for cases, records, forms, and legal-help resources.

Executive Branch

Governor, agencies, and public services

This state’s executive branch is led by the governor and supported by statewide offices, departments, boards, and agencies. This is usually the best starting point for public services, licenses, benefits, public safety, transportation, revenue, employment, education, and other state-administered programs.

Legislative Branch

This state Legislature

This state’s legislature introduces bills, holds committee hearings, debates policy, approves state budgets, conducts oversight, and represents districts across This state.

Judicial Branch

Courts, records, and legal help

This state’s judicial branch handles trial-court cases, appeals, court administration, records, forms, and legal-help resources. Visitors dealing with a court date, filing, case search, legal form, or self-help question should start with the official state judiciary resources.

Illinois voting guide

This state-page tab brings together practical voting resources for Illinois voters. You can register or update your registration, check registration status, find where to vote, review ballot resources, learn about mail or absentee voting, and use official election-calendar links for final deadlines and dates.

Voting Tools

Plain-language tools that open inside this state voting tab.

While we do our best to provide accurate information, be sure to use your official state election calendar for final details.