| Simon S. McDonald | |
| Office: | North Dakota Public Service Commissioner |
| Term Start: | January 1, 1941 |
| Term End: | December 31, 1948 |
| Predecessor: | none |
| Successor: | Elmer W. Cart |
| Birth Date: | December 11, 1869 |
| Death Date: | May 24, 1956 |
| Death Place: | Bismarck, North Dakota |
| Party: | Republican |
Simon S. McDonald (December 11, 1869 – May 24, 1956) was a North Dakota Republican Party politician who served as a North Dakota Public Service Commissioner from 1941 to 1948. Prior to 1941, his title was North Dakota Railroad Commissioner. He had served in that position since 1937.[1]
Simon McDonald was born in 1869. He was raised on a farm, educated in the machinist trade, and was employed by daily newspapers in different parts of the United States in his early adult years. He served as the machinist in charge of the mechanical department at the Grand Forks Herald after coming to North Dakota in March 1914. He was elected as President of the North Dakota Federation of Labor in June 1915, and served in that position until June 1920. He was appointed by Governor of North Dakota Lynn Frazier as a member of the Workmen's Compensation Bureau on April 1, 1919, and was re-appointed to the position by Governor Arthur Sorlie in 1925, and served until 1930. He was elected to the North Dakota Senate in 1932, and served there from 1933 to 1936. He was elected as a Railroad Commissioner in 1936, and his title changed to North Dakota Public Service Commissioner in 1940. He served until 1948 when, at age 79, he did not seek re-election. He died eight years later aged 86 in Bismarck.