Ptolemy (c. AD 100 – c. 170) was an Alexandrian mathematician, astronomer, geographer and astrologer.

Ptolemy, Ptolemaeus or Tolomeo may also refer to:

• Ptolemy (name), the English form of the Greek name Πτολεμαῖος (Ptolemaios)

Any of 15 Greco-Egyptian pharaohs of the Ptolemaic dynasty (305 BC–30 BC):

Also several dynasty members who ruled other territories, but not in Egypt:

• Ptolemy Apion, King of Cyrene (150–145 BC)
• Ptolemy Philadelphus (son of Cleopatra) (36 BC – 29 BC), King of Syria, Phoenicia, and Cilicia (34-30 BC)
• Ptolemy of Mauretania, client king of Mauretania (20–40 AD) for Rome

• Ptolemy (King of Thebes) (12th century BC), the mythical ruler of the ancient Greek city of Thebes
• Ptolemy of Aloros (ruled 368 to 365 BC), Regent of Macedon
• Ptolemy (somatophylax) (died 334 BC), Macedonian bodyguard and general of Alexander the Great
• Ptolemy (son of Seleucus) (died 333 BC), Macedonian bodyguard and general of Alexander the Great
• Ptolemy (son of Philip) (4th century BC), Macedonian officer of Alexander the Great
• Ptolemy (general) or Polemaios (died 309 BC), Macedonian general and nephew of Antigonus I Monophthalmus
• Ptolemy (son of Pyrrhus) (295–272 BC), a son of king Pyrrhus of Epirus
• Ptolemy of Epirus (reigned c. 237 BC – 234 BC), king of the Greek frontier kingdom of Epirus

• Ptolemy Macron (fl. 2nd century BC), governor of Coele-Syria and Phoenicia
• Ptolemaeus son of Glaucias (fl. 2nd century BC), ancient Egyptian hermit
• Ptolemaeus of Commagene (201 BC - 130 BC), satrap and then first King of Commagene
• Ptolemy son of Abubus, governor of Jericho (c. 130s BC) who betrayed the Hasmonean king Simon Thassi
• Ptolemy (son of Mennaeus) (rule ended ca. 40 BC), governor of biblical Abilene
• Ptolemaeus Chennus (2nd century AD), an Alexandrian grammarian
• Ptolemaeus and Lucius (d. c. 165 AD), Christian martyrs
• Ptolemy (gnostic) (c. 180 AD), a religious philosopher of Roman Italy and Gaul
• Ptolemy-el-Garib (fl. c. 300 AD), a Peripatetic pinacographer whose Life of Aristotle
• Ptolemaeus Secundus ('Second Ptolemy'), a nickname for the Arab polymath Ibn al-Haytham (c. 965 – c. 1040)
• Ptolemy I of Tusculum (d.1126), a count of Tusculum who asserted his family's descent from the Roman Julii
• Ptolemy II of Tusculum (d.1153), a count of Tusculum who married Bertha, daughter of Henry V, Holy Roman Emperor
• Ptolemaios Sarigiannis (1882–1958), a Greek Army officer
• Ptolemy Tompkins (born 1962), an American author
• Ptolemy Dean (born 1968), a British architect, author, and TV presenter
• Ptolemy Slocum (born 1975), an American actor
• Barry Ptolemy (born 1969), an American film director and producer

• Ptolemy of Lucca (c. 1236 – c. 1327), a medieval Italian historian
• Bernard Tolomeo (1272–1348), founder of the Olivetan Roman
• Tolomeo Gallio (1527–1607), an Italian cardinal
• Tolomeo Faccendi (1905–1970), an Italian sculptor
• Tolomeo Mwansa (1941-2014), a Zambian football goalkeeper
• Giovanni Battista Tolomei (1653–1726), Italian Jesuit priest, theologian, and cardinal

• Mount Ptolemy (Antarctica), a mountain in Graham Land, Antarctica
• Mount Ptolemy (Canada), a mountain in the Flathead Range of the Canadian Rockies

• Ptolemaeus (lunar crater), a crater on the near side of the Moon named after the astronomer
• Ptolemaeus (Martian crater), a crater on Mars named after the astronomer
• 4001 Ptolemaeus, a Florian asteroid

• Tolomeo ('Ptolemy'), an opera by Handel composed in 1728 about the life of Ptolemy IX of Egypt
• "Ptolemy", a track by Aphex Twin from the 1992 album Selected Ambient Works 85-92
• The Ptolemy, a 1934 large reed organ built by the American composer Harry Partch
• Ptolemaea, a song by Ethel Cain from her debut album Preacher's Daughter

• Ptolemy's Gate, a 2005 book and last installment of The Bartimaeus Trilogy, a fantasy series by the English author Jonathan Stroud
• Ptolemaic Terrascope a magazine founded in 1989
• Ptolemy Tortoise, a character in the 1906 short story The Tale of Mr. Jeremy Fisher by Beatrix Potter
• The Last Days of Ptolemy Grey, a 2010 novel by Walter Mosley

• Ptolemaios and Ptolemaios 2, spacecraft in anime Mobile Suit Gundam 00 and film Mobile Suit Gundam 00 the Movie: A Wakening of the Trailblazer
• The Last Days of Ptolemy Grey, a 2022 miniseries adapted from the novel by Walter Mosley

• All pages with titles beginning with Ptolemy
• All pages with titles containing Ptolemy
• Ptolemaeus (disambiguation)
• Tolomeo (disambiguation)

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