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State Senate District By Zip Code

Not sure of your congressional district or who your member is? This service will assist you by matching your ZIP code to your congressional district, with links to your member's website and contact page.

State Senate District By Zip Code

The Find Your Representative service matches the ZIP code information you provide with a list of congressional districts. If you receive an error due to a missing ZIP code or incorrect member information, please use the Contact Webmaster form to report the problem. Select the appropriate error category (Report an error in the Find Your Representative service.) and provide as much information as possible to assist us in researching the problem. Please be sure to include: Your Street Address, City, State and ZIP code, the member or congressional district information you are trying to reach and the member or congressional district the service is reporting that you feel is in error.

Enter street address followed by zip code (i.e., 700 W. Jefferson, 83420), and click Find. You may also click on the map to determine who the State Senator and House Representatives are for that location, or contact your county clerk for official legislative district information.

The legislative power of the state is vested in the General Assembly, which is composed of a 59-member Senate and a 118-member House of Representatives. Its principal activities are enacting, amending, or repealing laws; passing resolutions; adopting appropriation bills; and conducting inquiries on proposed legislation. Each legislative district is composed of one Senate district, which is divided into two Representative districts. Every two years, one Representative is elected from each Representative district for a two-year term. Members of the General Assembly are elected in the general election in even-numbered years. Senate districts are divided into three groups, and one or two groups are elected every two years.

The U.S. Census Bureau first reported data for state legislative districts (SLDs) as part of the 2000 Public Law (P.L.) 94-171 Redistricting Data File. The SLDs embody the upper (Senate) and lower (House) chambers of the General Assembly.

Thus, after the 2010 Census, the state House and Senate districts were redrawn in 2011. These districts will be used as the basis for the general election held in November 2012. They took effect with the beginning of the subsequent General Assembly in January 2013.

"The Illinois legislature used American Community Survey (ACS) data and passed a state legislative plan (HB 2777) on May 28, 2021, which the Governor signed on June 4, 2021. Following the release of the 2020 Census data on Aug. 12, 2021, the state legislature passed a second redistricting plan (SB 297), which the Governor signed on Sept. 24, 2021.

The state redistricting plans were challenged in federal court (See McConchie v. Ill. State Board of Elections, Contreras v. Ill. State Board of Elections and UCCRO v. Ill. State Board of Elections). The initial plan (HB 2777) using ACS data was ruled unconstitutional on Oct. 19, 2021. The second plan (SB 297) was upheld on Dec. 30, 2021." Source: Loyola Law School Redistricting website

Almost all site-based data (e.g., child care) and almost all demographic data (e.g., population) are presented by state House and Senate district in IECAM. Non-site-based data (e.g., early intervention) are not presented by state House and Senate district.

The Census Bureau requested a copy of the state laws and/or applicable court order(s) for each state from their 2010 Redistricting Data Program state liaison. Additionally, the states were asked to furnish their newly established legislative district boundaries and numbers by means of geographic equivalency files.

The Census Bureau entered this information into its geographic database and produced 2010 Census tabulation block equivalency files that depicted the newly defined legislative district boundaries. Each state liaison was furnished with their file and requested to review, submit corrections and certify the accuracy of the boundaries.

The House of Representatives consists of 110 members who are elected by you. Each state Representative represents a district with approximately 77,000 to 91,000 residents. Representatives are elected in even-numbered years to 2-year terms and are able to serve three terms total.

The Senate consists of 38 members who are elected by you. Each state Senator represents a districts with approximately 212,400 to 263,500 residents. Senators are elected in even-numbered years to 4-year terms and are able to serve two terms total.


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