Geoffrey Nathaniel Joseph Pyke (9 November 1893 – 21 February 1948) was an English journalist, educationalist, and later an inventor whose clever, but unorthodox, ideas could be difficult to implement.
Pyke came to public attention when he escaped from internment in Germany during World War I.
He had travelled to Germany under a false passport, and was soon arrested and interned.
Pyke is particularly remembered for his innovative proposals for weapons of war, most especially the material pykrete and the proposed construction of the ship Habakkuk from it.