Yay

Yay may refer to:
 * St. Anthony Airport, Newfoundland and Labrador, Canada, by IATA code
 * Gwune language, by ISO 639-3 code
 * Yay! (Motorpsycho album), 2023
 * Yay language, an alternate name for Bouyei, in southern Guizhou Province in mainland China
 * Youth Assisting Youth, a volunteer-based peer mentoring program based in Toronto, Ontario, Canada