Indiana's 1st congressional district is an electoral district for the U.S. Congress in Northwestern Indiana. The district is based in Gary and its surrounding suburbs and exurbs. It consists of all of Lake and Porter counties, as well as most of the western part La Porte County, on the border with Illinois and Michigan. Redistricting passed by the Indiana General Assembly in 2011 shifted the district's boundaries, effective January 2013, to include all of Lake and Porter counties and the western and northwestern townships of La Porte County, while moving Benton, Jasper and Newton counties out of the district.