| Ridgley C. Powers | |
| Order1: | 29th Governor of Mississippi |
| Lieutenant1: | Alexander K. Davis |
| Term Start1: | November 30, 1871 |
| Term End1: | January 4, 1874 |
| Predecessor1: | James L. Alcorn |
| Successor1: | Adelbert Ames |
| Order2: | 7th Lieutenant Governor of Mississippi |
| Governor2: | James L. Alcorn |
| Term Start2: | 1870 |
| Term End2: | 1871 |
| Predecessor2: | Office re-created |
| Successor2: | Alexander K. Davis |
| Birth Name: | Ridgley Ceylon Powers |
| Birth Date: | December 24, 1836 |
| Birth Place: | Mecca, Ohio |
| Death Place: | Los Angeles, California |
| Party: | Republican |
| Alma Mater: | University of Michigan Union College |
Ridgley Ceylon Powers (December 24, 1836 – November 11, 1912) was a U.S. Army officer in the American Civil War who served as Mississippi's lieutenant governor in 1870 before becoming governor from 1871 to 1874.[1] He was from Ohio and served in the Union Army during the American Civil War. He succeeded James L. Alcorn as governor when Alcorn resigned to become a U.S. senator.
He was born in Mecca, Ohio, on Christmas Eve. He graduated from the University of Michigan and completed post-graduate work at Union College in Schenectady, New York, in 1862.
In the second year of the American Civil War, Powers enlisted into the United States Army as a private. He became a second lieutenant and later a captain in the 125th Ohio Volunteer Infantry. He served at the Third Battle of Chattanooga and in the Atlanta Campaign before returning with his regiment to Tennessee for much of the remainder of the war. He ended his military service as a colonel upon the end of the conflict.
In 1865, the Ohioan settled in Noxubee County, Mississippi as a cotton planter, later becoming sheriff. During Reconstruction, Powers was elected the seventh lieutenant governor and began his term in 1870. Governor James L. Alcorn resigned the following year to accept a U.S. Senate seat, thereby making Powers the acting governor; he finished the unexpired term ending in 1874.
Powers died in Los Angeles, California in 1912.