ATH

Ath is a city in Belgium.

The acronym or initials ATH may also refer to:

• Athens International Airport, Greece, IATA code
• Atherstone railway station, UK, National Rail code
• Around the Horn, an ESPN Television Show
• Absolute threshold of hearing
• ATH (interbank network), Puerto Rico and the Caribbean
• A Toda Hora, a Colombian interbank network
• The Hayes command set for modems "hang up" command
• University of Bielsko-Biała (Polish: {{lang|pl|Akademia Techniczno-Humanistyczna w Bielsku-Białej}} or "ATH" in its logo and web site)
• Athabaskan languages (ISO 639-2 and ISO 639-5 codes)
• The abbreviation for the Athletics baseball team, formerly known as the Oakland Athletics (OAK).