Greek may refer to anything of, from, or related to Greece, a country in Southern Europe.

• Greeks, an ethnic group
• Greek language, a branch of the Indo-European language family
  • Mycenaean Greek language, most ancient form of the language (16th to 11th centuries BC)
  • Ancient Greek, forms of the language used c. 1000–330 BC
  • Koine Greek, common form of Greek spoken and written during Classical antiquity
  • Medieval Greek or Byzantine Greek, language used between the Middle Ages and the Ottoman conquest of Constantinople
  • Modern Greek, varieties spoken in the modern era (from 1453 AD)
• Greek alphabet, script used to write the Greek language
• Greek Orthodox Church, several Churches within the larger communion of Eastern Orthodox Christianity
• Ancient Greece, the classical civilization centered in Greece

Greek may also refer to:

• Greek (play), 1980 play by Steven Berkoff
• Greek (opera), 1988 opera by Mark-Antony Turnage, based on Steven Berkoff''s play
• Greek (TV series), an ABC Family show
• Greeks (finance), quantities representing the sensitivity of the price of derivatives
• Greeking, style of displaying or rendering text or symbols in a computer display or typographic layout
• Greek system or fraternities and sororities, social organizations for undergraduate students at North American colleges
• Greek Theatre (Los Angeles), a theatre located at Griffith Park in Los Angeles, California
• Greek love, a term referring variously to male bonding, homosexuality, pederasty and anal sex
• The Greeks 1951 non-fiction book on classical Greece by HDF Kitto
• The Greeks, a 1980 cycle of ten plays adapted by John Barton and Kenneth Cavander from the works of Homer, Euripides, Aeschylus and Sophocles
• Greek Cyprus, an island country in the Eastern Mediterranean Sea