Saul Adadi (Hebrew: שאול אדאדי, 1850 – September 18, 1918) was a Sephardi Hakham, rosh yeshiva, and paytan in the 19th-century Jewish community of Tripoli, Libya. He was heavily involved in youth education, founding a yeshiva and co-founding and serving as principal of a Talmud Torah. He preserved the pinkasim (community record books) of the Tripoli Jewish community, unpublished manuscripts of 18th-century Tripoli Jewish leader Rabbi Abraham Khalfon, and sefarim belonging to his father, Hakham Abraham Hayyim Adadi, a senior rabbi of the previous generation.