Yat or jat ( ; italics: Ѣ ѣ) is the thirty-second letter of the old Cyrillic alphabet, as well as the name of the sound it represented. Its name in Old Church Slavonic is jět’ or iat’ . In the common scientific Latin transliteration for old Slavic languages, the letter is represented by e with caron: (taken from the Czech alphabet).

Yat may refer to:

• Yat (, ), a Cyrillic letter
• Yat dialect, spoken in New Orleans
• Attawapiskat Airport (airport code YAT)
• Yambeta language, a Southern Bantoid language of Cameroon.
• YAT Anshin! Uchu Ryoko, an anime series
• York Archaeological Trust
• Young Actors Theatre (disambiguation)
• yat, a former typographical representation for the word that