Born in Russellville, Kentucky, Ewing attended the public schools.
He studied theology at the Baptist Seminary at Newton, Massachusetts, in 1845 and 1846.
Ewing was elected as a Whig to the Thirty-second and Thirty-third Congresses and served from March 4, 1851, until his death in the town of Mammoth Cave, Kentucky, September 27, 1854.
He was interred in Maple Grove Cemetery, Russellville, Kentucky.
This article incorporates public domain material from the Biographical Directory of the United States Congress