克劳狄乌斯・托勒密（古希腊语：Κλαύδιος Πτολεμαῖος；拉丁语：Claudius Ptolemaeus，约90年－168年，又译托勒玫或多禄某），是一位埃及希腊作家，同时也是数学家、天文学家、地理学家、占星家。托勒密是一位罗马公民，生活在罗马帝国埃及行省的亚历山大港，并以通用希腊语写作。除此之谓，历史上几乎没有留下什幺对于他个人生活的有根据的记载。虽然未经证实，但14世纪的天文学家Theodore Meliteniotes宣称托勒密出生于埃及Thebaid的托勒密赫米欧（Ptolemais Hermiou）。这个说法离托勒密生活的年代已经非常遥远，目前没有任何证据显示他曾在除了亚历山大港以外的任何地方居住过。托勒密于公元168年逝世于埃及亚历山大港。

Claudius Ptolemy (/ˈtɒləmi/; Greek:Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos, [kláwdios ptolɛmɛ́ːos]; Latin:Claudius Ptolemaeus; c. AD 100 – c.170) was a Greco-Egyptian writer, known as a mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology. He lived in the city of Alexandria in the Roman province of Egypt, wrote in Koine Greek, and held Roman citizenship. Beyond that, few reliable details of his life are known. His birthplace has been given as Ptolemais Hermiou in the Thebaid in an uncorroborated statement by the 14th-century astronomer Theodore Meliteniotes. This is a very late attestation, however, and there is no other reason to suppose that he ever lived anywhere else than Alexandria, where he died around AD 168.