TRP may refer to:
- Trooper, Canadian military abbreviation
- Tryptophan, an amino acid
- The transient receptor potential channel
- Time Reading Program, a book sales club run by Time Life Books in the 1960s
- Thomas Ruggles Pynchon, American writer
- Target rating point, an audience estimation measure
- T. Rowe Price, an investment firm
- Total Radiated Power