Robert fitz Martin (c. 10?? – c. 1159) was a knight from Devon whose father, Martin de Turribus, was the first Norman Lord of Kemes, in what had previously been the Dyfed part of Deheubarth. Fitz Martin inherited the Lordship of Kemes from his father, and founded St Dogmaels Abbey c. 1118. He was the first of the FitzMartin line. His descendants continued to hold lands in England and Wales until the 14th century.