The 2004 United States House of Representatives elections in Connecticut were held on November 2, 2004, to elect the five members of the U.S. House, one from each of the state's congressional districts, to represent Connecticut in the 109th Congress.

3 Term Incumbent Democrat John B. Larson faced Republican challenger John Halstead in the election; Larson was re-elected to a fourth term with 72.98 percent of the vote Results Incumbent Republican Rob Simmons went up against Democratic nominee Jim Sullivan.

Results Incumbent Democrat Rosa L. DeLauro faced Republican challenger Richter Elser, in the election; DeLauro was re-elected in a landslide margin of 47.47%.

Results Incumbent Republican Christopher Shays faced Democratic challenger Diane Farrell in the election; Shays was re-elected with 52.43 percent of the vote.

Results Incumbent Republican Nancy L. Johnson faced Democratic challenger Theresa B. Gerratana, Nancy L. Johnson defeated the Gerratana with 59.79% of the vote.