PTU
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PTU may refer to:
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Science and medicine
- Paroxysmal tonic upgaze, ophthalmological disorder
- Phenylthiourea, an organosulfur thiourea
- Power transfer unit, for aircraft hydraulic systems
- Propylthiouracil, a hyperthyroidism drug
Universities
- Puducherry Technological University, Pondicherry, India
- Punjab Technical University, Jalandhar, India
- Pyay Technological University, Burma
Organizations
- Australian Rail Tram and Bus Industry Union or Public Transport Union
- Hong Kong Professional Teachers' Union
- Paratroop Training Unit RAAF, during WWII
- Plumbing Trades Union, UK
Other uses
- PTU (film), Hong Kong, 2003
- Platinum Airport, Alaska, US, IATA code
- Police Tactical Units (PTUs)
- Professional technical school (Russian: {{lang|ru-Latn|Professionalno-tehnicheskoye uchilische}}) in the Soviet Union
- {{lang|pl|Podatek od towarów i usług}}, value-added tax in Poland