TPO

TPO may refer to:

Arts

 * Taipei Philharmonic Orchestra
 * Thailand Philharmonic Orchestra
 * Tin Pot Operation, an indie-punk band from Belfast, Northern Ireland
 * Tokyo Philharmonic Orchestra

Biology and medicine

 * the temporo-parieto-occipital junction of the brain
 * thyroid peroxidase (or thyroperoxidase), an enzyme in the thyroid
 * thrombopoietin, a hormone stimulating platelet growth

Government

 * Transportation Planning Organization, United States

Law

 * Temporary protective order, a court order banning someone from going near a third party that they have allegedly harassed, in Ireland or the United States
 * a tree preservation order in the United Kingdom

Science and technology

 * Thermoplastic olefin, a plastic polymer/filler blend
 * Transmitter power output in radio transmission

Other

 * The People's Operator, a mobile virtual network operator in the United Kingdom
 * Third-party ownership in association football
 * A transit patrol officer of Victoria Transit Patrol, Australia
 * Travelling Post Offices, mail trains in Great Britain and Ireland
 * Travelling Post Office, Queensland, mail trains in Australia
 * Treatment plant operator, an operator of water and waste water treatment plants
 * Triple peel on opponent manoeuvre in croquet