This is a complete list of United States senators during the 94th United States Congress listed by seniority from January 3, 1975, to January 3, 1977.
Order of service is based on the commencement of the senator's first term. Behind this is former service as a senator (only giving the senator seniority within their new incoming class), service as vice president, a House member, a cabinet secretary, or a governor of a state. The final factor is the population of the senator's state.
The most senior junior senator in this Congress was John Stennis. The most junior senior senator in this Congress was Floyd Haskell until Robert Taft resigned on December 28, 1976, after which the distinction was held by John Glenn.
Senators who were sworn in during the middle of the two-year congressional term (up until the last senator who was not sworn in early after winning the November 1976 election) are listed at the end of the list with no number.
The most senior senators by class were John C. Stennis (D-Mississippi) from Class 1, James Eastland (D-Mississippi) from Class 2, and Warren G. Magnuson (D-Washington) from Class 3. Stennis was the most senior senator from his class while being the junior senator from his state.