Nathan Ryno Smith

Nathan Ryno Smith (May 21, 1797 – July 3, 1877) was an American surgeon and medical school professor.

Smith had received his bachelor's degree in 1817, and had worked as a tutor for a family in Fauquier County, Virginia for a time before taking up medical studies.

Smith later joined the faculty of the University of Maryland where he served as the clinical surgeon at the Baltimore Infirmary.

Smith and his wife Juliette, daughter of the botanist, Frances Penniman, had two sons of note.

Smith's grandson, Samuel Theobald was a professor of ophthalmology at Johns Hopkins University.