| Charles F. Amidon | |
| Office: | Senior Judge of the United States District Court for the District of North Dakota |
| Term Start: | June 2, 1928 |
| Term End: | December 26, 1937 |
| Office1: | Judge of the United States District Court for the District of North Dakota |
| Term Start1: | August 31, 1896 |
| Term End1: | June 2, 1928 |
| Appointer1: | Grover Cleveland |
| Predecessor1: | Alfred Delavan Thomas |
| Successor1: | Seat abolished |
| Birth Name: | Charles Fremont Amidon |
| Birth Date: | 17 August 1856 |
| Birth Place: | Clymer, New York, U.S. |
| Death Place: | Tucson, Arizona, U.S. |
| Education: | Hamilton College (A.B.) read law |
Charles Fremont Amidon (August 17, 1856 – December 26, 1937), frequently known as C. F. Amidon,[1] was a United States district judge of the United States District Court for the District of North Dakota.
Born in Clymer, New York, Amidon received an Artium Baccalaureus degree from Hamilton College in 1882 and read law to enter the bar in 1886. He was in private practice in Fargo, Dakota Territory (State of North Dakota from November 2, 1889) from 1887 to 1890, and was city attorney of Fargo from 1890 to 1894, returning to private practice from 1894 to 1896. He was a Code Commissioner for the commission to Revise Codes of North Dakota from 1893 to 1895.
Amidon received a recess appointment from President Grover Cleveland on August 31, 1896, to a seat on the United States District Court for the District of North Dakota vacated by Judge Alfred Delavan Thomas. He was nominated to the same position by President Cleveland on December 8, 1896. He was confirmed by the United States Senate on February 18, 1897, and received his commission the same day. He assumed senior status on June 2, 1928. His service terminated on December 26, 1937, due to his death in Tucson, Arizona. He was the last federal judge in active service to have been appointed by President Cleveland, and the longest-serving.