The Protpittayapayat School is a public high school in Bangkok, Thailand.

On 1 August 1949, Protpittayapayat School was established as a public high school in Lat Krabang District. The first building on the grounds was a house belonging to Lady Liam, who donated the land for educational purposes. The other buildings consist of two primary schools, a high school, and two universities. The school was named in honour of Lady Liam's late husband, Professor Propittayapayat.

1. Science – Math (Gifted)
2. IEP (Intensive english program)
3. Health Sciences
4. Engineering and Architecture
5. Computer Technology
6. Modern Business Commerce
7. Tourism and Hospitality
8. Creative Communication Arts
9. Humanities for Thai Language Communication (Arts-Thai)
10. Humanities for Japanese Language Communication (日本語学科/Arts-Japanese)
11. Humanities for Chinese Language Communication (Arts-Chinese)
12. Humanities for French Language Communication (Arts-French)
13. Law and Governance
14. Economics and Commercial Management
15. Sports and Recreation for Careers
16. Food Production Innovation and Management

• 
  Protpittayapayat school
• 
  Auditorium
• 
  Stadium primary school
• 
  50 years Protpittayapayat Indoor Stadium.
• 
  Loung Protpittayapaya /Sir Leam Bunnark Park
• 
  Loung Protpittayapaya /Sir Leam Bunnark Monument

• Official website (in Thai)
• ProtSocialHub (in Thai)
• ProtSocialHub
• Protpittayapayat School Student Network (in Thai)
• Dek-wit-2 of Protpittayapayat School (in Thai)

13°43′35″N 100°47′04″E / 13.7265°N 100.7845°E / 13.7265; 100.7845