Leo

Leo or LEO may refer to:

• LEO (computer), an electronic device
• Leo (constellation), a section of the night sky
• Leo (astrology), a sign of the zodiac
• Leo (horse), an American Quarter Horse
• LEO (spacecraft), a lunar mission
• Leo (text editor), a computer program
• LEO (website), a group of dictionaries
• L.E.O., a music development project
• The Leo, a Filipino basketball award
• Law enforcement officer, an official
• Low Earth orbit, a satellite path
• Long-term Ecosystem Observatory, a marine study project
• Leos, nickname for Canadian Football League's BC Lions