GHA may refer to:
- Georgia Hospital Association
- Generalized Hebbian Algorithm, a learning rule for neural networks
- Gha, a letter that has been used in various orthographies for Turkic languages
- Glasgow Housing Association
- Glasgow Hutchesons Aloysians RFC, a rugby union club in Scotland
- Global Hardcore Alliance, an online community for hardcore DJs and listeners
- Global hectare, a measurement of the average biocapacity of all hectare measurements of any biologically productive areas on the planet
- Good Homes Alliance, a group committed to promoting sustainable housing in the United Kingdom
- Guitar Hero: Aerosmith, a video game in the Guitar Hero series of music video games
- Greenwich hour angle
- Ghost Hunters Academy, the third spin-off of popular paranormal show Ghost Hunters.
- Ghana