Trumpler or Trümpler may refer to:
Surname
- Hans-Konrad Trümpler (born 1960), Swiss rower
- Robert Julius Trumpler (1886–1956), Swiss-American astronomer
Astronomy
- Trumpler (lunar crater), a lunar impact crater
- Trumpler (Martian crater), a crater in the Phaethontis quadrangle of Mars
- Trumpler classification