 All or parts of Addison, Barrington Hills, Bloomingdale, Carol Stream, Carpentersville, East Dundee, Elgin, Elk Grove Village, Glendale Heights, Hanover Park, Hoffman Estates, Lombard, Palatine, Roselle, Schaumburg, South Elgin, Streamwood, Villa Park and Wood Dale are included.These boundaries became effective on January 3, 2013.Incumbent Representative Joe Walsh was drawn out of the district for 2012 by 2011 redistricting, although a candidate is not required to live in the district to be eligible to run for a seat in Congress.