HART may refer to:
Transportation
- Hillsborough Area Regional Transit, Florida
- Honolulu Authority for Rapid Transportation, Hawaiʻi
- Housatonic Area Regional Transit, Connecticut
- Huntington Area Rapid Transit, Long Island, New York
Response or rescue teams
- Hazardous area response team, UK<!-- within British ambulance services -->
- High Acuity Response Team, a type of Rapid response team (medicine)
Science and technology
- HART Communications Protocol (Highway Addressable Remote Transducer) - a communication protocol used in the process industries.
- Human Assisted Reproductive Technology
- Hypervelocity Aircraft Rocket, Tactical
Other uses
- Halt All Racist Tours, New Zealand
- Health Advisory and Recovery Team, a British antivaccine pressure group
- Heterogeneous Aerial Reconnaissance Team
- Hillsboro Artists' Regional Theatre
See also
- Highly active antiretroviral therapy (HAART), a treatment for HIV
- Hart (disambiguation)