Iron Sky is a 2012 Finnish-German-Australian comic-science-fiction action film directed by Timo Vuorensola and written by Johanna Sinisalo and Michael Kalesniko. It tells the story of a group of Nazi Germans who, having been defeated in 1945, fled to the Moon, where they built a space fleet to return in 2018 and conquer Earth. Iron Sky is one of the most expensive Finnish films.

Iron Sky comes from the creators of Star Wreck: In the Pirkinning and was produced by Tero Kaukomaa of Blind Spot Pictures and Energia Productions, co-produced by New Holland Pictures and 27 Films, and co-financed by numerous individual supporters; Samuli Torssonen was responsible for the computer-generated imagery. It was theatrically released throughout Europe in April 2012. A director's cut of the film with 20 additional minutes was released on DVD and Blu-ray on 11 March 2014.A video-game adaptation titled Iron Sky: Invasion was released in October 2012.

A sequel, titled Iron Sky: The Coming Race, was crowdfunded through Indiegogo and released in January 2019.