William Elmer Holt (October 14, 1884 – March 1, 1945) was an American politician.

[1] Holt was born in Savannah, Missouri, and moved with his family to a ranch in Miles City, Montana.

He was a member of the Montana State Senate from 1933 to 1935, and was chosen as president pro tempore in 1935.

[5] Holt retired from political life, and later served as a land agent for Northern Pacific Railroad in Seattle, Washington.

[6] Holt died on March 1, 1945, in Seattle, Washington, where he was with the Northern Pacific Land Office.