Porphyry (/ˈpɔːrfɪri/; Greek: Πορφύριος, Porphyrios "purple-clad") may refer to:
- Porphyry (geology), an igneous rock with large crystals in a fine-grained matrix and important Roman building material
- Porphyritic, the general igneous texture of a rock with two distinct crystal (phenocryst) sizes
- Porphyry copper deposit, a primary (low grade) ore deposit of copper, consisting of porphyry rocks
- Porphyry Island in Lake Superior
- Porphyry Mountain in Alaska
- Porphyry (philosopher) (234–305), Neoplatonic philosopher
- Porphyry of Gaza (or "St. Porphyry of Gaza", 347–420), Bishop of Gaza
- Porphyry, a system of astrological house division
- Porphyry, a vineyard near Seaham, New South Wales
See also
- Porfirio (disambiguation), various uses, including a Spanish surname
- Porfiry, a Russian given name
- Porphyra, a foliose red algal genus of laver
- "Porphyria's Lover", originally published as "Porphyria", a poem by Robert Browning
- Porphyria, a disease
- Porphyrian tree, classic device for illustrating hierarchy and ontology
- Porphyrins, a group of organic compounds
- Porphyrion, a giant in Greek mythology
- Porphyrius the Charioteer, Roman charioteer in the 5th and 6th centuries AD
- Tyrian purple or Porphyra, a purple-red natural dye
- Porphyrio, also known as Pomponius Porphyrion, a Latin grammarian, fl. 2nd or 3rd century
- Article titles containing the text "Porphyr"