Hastert resigned from Congress in November 2007 and on March 8, 2008, the 2008 Illinois's 14th congressional district special election was held to fill the vacancy.

They are partitioned by Gillis Rd, Anjali Ct, W Mortel Rd, Kishwaukee River, Bass Line Rd, Illinois Highway 23, Whipple Rd, Plank Rd, Swanson Rd, and Darnell Rd.

The 14th district takes in the communities of LaSalle, Ottawa, Oglesby, Peru, Earlville, Mendota, Cedar Point, North Utica, Naplate, Dayton, Wedron, Troy Grove, Triumph, Earlville, Harding, Leland, Serena, Sheridan, Millington (shared with Kendall County), Somonauk (shared with DeKalb County), and Lake Holiday; half of Seneca; and part of Tonica, Marseilles, and Seneca (shared with Grundy County).

The 14th and 11th districts are partitioned by The 14th takes in the communities of Joliet, Plainfield (shared with Kendall County), Shorewood, Crystal Lawns, Sunnyland, Crest Hill, Rockdale, Fairmont, Ridgewood, Ingalls Park, and Preston Heights; most of Romeoville; southwestern Naperville; western Bolingbrook; western Lemont; eastern Elwood; and half of Lockport.

After the 2011 redistricting which followed the 2010 census, meaning from the 2012 election on, the congressional district covers parts of the counties of DeKalb, DuPage, Kane, Kendall, Lake, McHenry and Will.

[4] Incumbent Randy Hultgren defeated Democratic challenger Dennis Anderson to keep his spot in the House of Representatives.