Adamantios Lemos (Greek: Αδαμάντιος Λεμός; 1916–2006) was a Greek actor. He was one of the most influential figures in modern Greek theatre. During his 60-year career, he worked as a theatrical producer, actor, manager, theatrical teacher, director, and clothier. Lemos worked with several major theater companies, including Kotopouli Company and Katerina, before opening his namesake Lemos Theater in 1944. He also visited America, where his first non-Greek play ran from 1957 through 1967.