Sam Ellis Haddon (born June 19, 1937) is an American attorney and jurist serving as an inactive senior United States district judge of the United States District Court for the District of Montana.

Haddon began his legal career as a law clerk for William James Jameson.

[3] He was in private practice in Montana from 1966–2001[4] at the law firm of Boone, Karlberg and Haddon.

[3] He would fill the Great Falls seat vacated by Judge Charles C.

[5] Haddon was confirmed by the United States Senate on July 20, 2001 with a unanimous 95-0 vote.