季蒂昂的芝诺（Ζήνων，前335年－前263年），古希腊哲学家（不同于西元前五世纪的埃利亚的芝诺），出生于塞浦路斯的季蒂昂（Citium），于西元前313年左右到雅典研究哲学，受到苏格拉底、赫拉克利特、犬儒学派等的影响。于西元前305年左右创立了斯多噶学派。

Zeno of Citium (/ˈziːnoʊ/; Greek:Ζήνων ὁ Κιτιεύς, Zēnōn ho Kitieus; c. 334 – c. 262 BC) was a Greek thinker from Citium (Κίτιον, Kition), Cyprus, and probably of Phoenician descent. Zeno was the founder of the Stoic school of philosophy, which he taught in Athens from about 300 BC. Based on the moral ideas of the Cynics, Stoicism laid great emphasis on goodness and peace of mind gained from living a life of Virtue in accordance with Nature. It proved very successful, and flourished as the dominant philosophy from the Hellenistic period through to the Roman era.