There are 435 congressional districts in the United States House of Representatives, with each one representing approximately 711,000 people. In addition to the 435 congressional districts, the five inhabited U.S. territories and the federal district of Washington, D.C. each send a non-voting delegate to the House of Representatives. The Census Bureau within the United States Department of Commerce conducts a decennial census whose figures are used to determine the number of Representatives that each state sends to Congress, and therefore the number of congressional districts within each state. The borders of those districts are set by the states, and within each state all districts are required to have approximately equal populations (see Wesberry v. Sanders). The 2012 elections were the first to be based on the congressional districts which were defined based on the 2010 Census data.
Michigan is divided into 14 congressional districts, each represented by a member of the United States House of Representatives. Currently, the 13th District has no representation due to the retirement of Congressman John Conyers. The members of the Michigan Delegation to the United States House of Representatives are as follows:
1st Congressional District ~ Congressman Jack Bergman
2nd Congressional District ~ Congressman Bill Huizenga
3rd Congressional District ~ Congressman Justin Amash
4th Congressional District ~ Congressman John Moolenaar
5th Congressional District ~ Congressman Dan Kildee
6th Congressional District ~ Congressman Fred Upton
7th Congressional District ~ Congressman Tim Walberg
8th Congressional District ~ Congressman Mike Bishop
9th Congressional District ~ Congressman Sander Levin
10th Congressional District ~ Congressman Paul Mitchell
11th Congressional District ~ Congressman Dave Trott
12th Congressional District ~ Congresswoman Debbie Dingell