HART may refer to:

• Halt All Racist Tours, New Zealand
• Health Advisory and Recovery Team, a British antivaccine pressure group
• Heterogeneous Aerial Reconnaissance Team
• Highway Addressable Remote Transducer Protocol
• Hillsboro Artists' Regional Theatre
• Human Assisted Reproductive Technology
• Hypervelocity Aircraft Rocket, Tactical

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
• 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.

See also

• Highly active antiretroviral therapy (HAART), a treatment for HIV