Mamungkukumpurangkuntjunya Hill (or Mamungkukumpurangkuntjunya) is a hill in the Australian state of South Australia located in the Anangu Pitjantjatjara Yankunytjatjara lands about west of the town of Marla and about south-west of the settlement of Mimili.
The name means "where the devil urinates" in the regional Pitjantjatjara language and was recorded during a field trip organised by an unspecified state government agency in May 1989. It was gazetted on 4 November 2010 by the Government of South Australia as "Mamungkukumpurangkuntjunya" without the word "hill". The name is the longest official place name in Australia.