Chris John attended until 1978, the Notre Dame High School in Acadia Parish. Then he studied until 1982 at Louisiana State University in Shreveport. Between 1974 and 1982 he was at times was his father John N. John, the representative in the House of Representatives from Louisiana assistant. Chris John was a member of the Democratic Party. Between 1988 and 1996 he was also in the State Parliament. He was a member of the local Chamber of Commerce.
In the congressional elections of 1996, John was in the seventh election district of Louisiana in the U.S. House of Representatives in Washington DC chosen, where he became the successor of Jimmy Hayes on 3 January 1997. After three re- elections, he was able to complete in Congress until January 3, 2005, four legislative sessions. In 2004, he ran unsuccessfully for the U.S. Senate; with a vote share of 29 percent, he finished only second place behind the victorious Republican David Vitter.
Since his retirement from the U.S. House of Representatives Chris John works as a lobbyist. He is married to Payton Smith, with whom he has two sons.