Thy

THY or Thy may refer to:


 * Thy, the genitive case of the English personal pronoun thou (archaic)
 * Thy (district), Jutland, Denmark
 * Thymine, one of the four nucleobases in the nucleic acid of DNA
 * Turkish Airlines (ICAO: THY, from Turkish Türk Hava Yolları)
 * The first month in the Egyptian Middle Kingdom lunar calendar
 * Lennart Thy (born 1992), German footballer