Manuel María Orellana Contreras (17 December 1870 in El Jícaro, Guatemala – 17 June 1940 in Barcelona, Spain) was a Guatemalan army officer and politician, and from 17 to 31 December 1930, de facto interim President of Guatemala, after leading a coup d'état that ended Baudilio Palma interim presidency.
Palma, in turn, had been appointed president only four days earlier, when president Lázaro Chacón González suffered a stroke and was forced to resign.
At the moment the coup took place, orellana Contreras was commander of the San Rafael de Matamoros Fort in Guatemala City.