This list of members of the United States Congress by longevity of service includes representatives and senators who have served for at least 36 years, in the United States Senate, the United States House of Representatives, or both. In cases where there is a tie in time, the following criteria will sort people higher: Achieved time uninterrupted (for total tenure ranks) Achieved time first Senators over representatives (for Senate and House lists) Senate and House seniority
Key Currently servingServed in the U.S. Senate (for combined categories)Served in the U.S. House (for combined categories)Interruptions in service (for total tenure categories)
Combined U.S. Senate and U.S. House time