Dr. John Truman Carter III, portrayed by Noah Wyle, is a fictional medical doctor from the television series ER. The character was introduced in the pilot episode, and, without interruption, was the only major character to have stayed with the show from the beginning of the series up to the 2004/2005 season, for a total of eleven consecutive seasons.
John McGregor Carter (8 May 1950 - ) is a New Zealand politician, and member of the National Party.
John R. Carter (born November 6 1941) is a Republican United States Congressional Representative from the 31st District in Texas (http://nationalatlas.gov/printable/images/preview/congdist/tx31_109.gif map). The central Texas district encompasses Williamson, Erath, Hamilton, Coryell, Bell, Milam, Falls and parts of Robertson counties, and includes Fort Hood, the largest military installation in the world.