Maechler or Mächler is a surname. Notable people with the surname include:
Daniel Maechler (born 1974), Swiss skeleton racer Erich Maechler (born 1960), Swizz cyclist Pat Mächler (born 1983), Swiss politician, co-founder of Pirate Parties International Patrick Mächler (born 1972), Swiss cross-country skier Stefan Maechler, Swiss historian