THA

Tha or THA may refer to:


 * Temporary Housing Area
 * Tetrahydroaminoacridine or Tacrine
 * Texas Heartbeat Act
 * Tha language, an Adamawa language of Nigeria
 * Tha (Javanese) (ꦛ), a syllable
 * Ṭha (Indic) a letter of Indic abugidas
 * Tha (film), India
 * Tha, a track by Aphex Twin on Selected Ambient Works 85–92
 * THA, the IATA code for Tullahoma Regional Airport in the state of Tennessee, US
 * THA, the ICAO code for Thai Airways International
 * tha, the ISO 639-3 code for the Thai language
 * THA, the National Rail code for Thatcham railway station in the county of Berkshire, UK
 * Tobago House of Assembly, legislative body
 * Total hip arthroplasty or hip replacement
 * Transvaal Horse Artillery
 * Troy Housing Authority, an agency of Troy, New York that subsidizes public housing