TPA
TPA may refer to:
Business and finance
- Third-party access, a competition principle regarding natural resources
 - Third-party administrator for processing insurance claims and retirement plans
 - Tonnes per annum
 - Tons per acre, wine grape production term for estimating yield
 
Law
- Trade Practices Act 1974, Australian competition law legislation
 - Trade Promotion Authority, a power of the US president
 
Organisations
- Political Union of Economists (Latvian: Tautsaimnieku Politiskā Apvienība), former Latvian political party
 - TaxPayers' Alliance, a British free-market lobby group
 - Tempe Preparatory Academy, a preparatory secondary school in Arizona, U.S.
 - Texas Pharmacy Association, U.S.
 - Theta Phi Alpha a collegiate women's fraternity. Formerly known as TPA, now Theta Phi Alpha.
 - Toronto Paramedic Association, Canada
 - Travelers Protective Association
 
Science and medicine
- Terephthalic acid, an aromatic acid and monomer used in many plastics
 - Tetradecanoyl phorbol acetate (12-O-Tetradecanoylphorbol-13-acetate), a tumor promoter drug
 - Tissue plasminogen activator (tPA), a fibrinolytic enzyme in biochemistry and medicine
 - Transpalatal arch, an orthodontic device
 - Tris(2-pyridylmethyl)amine
 - Two-photon absorption
 
Television
- Televisão Pública de Angola, the state-owned TV station in Angola
 - Televisión Pública Argentina, a television network in Argentina
 - Television Programs of America, a television production company of the 1950s
 - Televisión del Principado de Asturias, broadcaster in Asturias, Spain
 
Transport
- Tampa International Airport, by IATA code
 - Tanzania Ports Authority
 - Toronto Parking Authority, Canada
 - Toronto Port Authority, Canada
 
Other
- Taipei Assassins, a Taiwanese esports team
 - Tennis Professional Association or TPA, a member-based association devoted to growing the tennis coaching profession in Canada.
 - Terapascal (TPa), a unit of pressure or stiffness
 - Terminal Portuario de Arica, an important port in northern Chile
 - The Pinball Arcade, a pinball video game developed by FarSight Studios
 - Thermal Protective Aid, an aluminized polyethylene suit
 - Thickened pyrophoric agent, triethylaluminium used as an incendiary weapon
 - Third-party authentication, term usually applied to an app which enables a type of multi-factor authentication
 - TPA Tour, name for the US golf PGA Tour for a few months in 1981-82
 - Trade Practices Act 1974, the predecessor to the Competition and Consumer Act 2010, Australian legislation
 - Transient program area, in a CP/M computer system