List of members of the United States House of Representatives in the 111th Congress by seniority

This is a complete list of members of the United States House of Representatives during the 111th United States Congress (January 3, 2009 – January 3, 2011) in order of seniority. For the most part, representatives are ranked by the beginning of their terms in office. Representatives whose terms begin the same day are ranked by seniority.

Note: The "*" indicates that the representative/delegate may have served one or more non-consecutive terms while in the House of Representatives of the United States Congress.