Island at War is a British television series that tells the story of the German occupation of the Channel Islands. It primarily focuses on three local families: the upper class Dorrs, the middle class Mahys, and the working class Jonases, and four German officers. The fictional island of St Gregory serves as a stand-in for the real-life islands of Guernsey and Jersey, and the story is compiled from the events on both islands.

Produced by Granada Television in Manchester, Island at War had an estimated budget of £9 million and was filmed on location in the Isle of Man from August 2003 to October 2003. When the series was shown in the UK the following year, it appeared in six 70-minute episodes.