Space Viking is a science fiction novel by American writer H. Beam Piper, set in his Terro-Human future history. It tells the story of one man's search for his wife's murderer and its unexpected consequences. The story was originally serialized in Analog magazine, then published by Ace Books in 1963.

Henry Beam Piper was an American science fiction writer. He wrote many short stories and several novels. He is best known for his extensive Terro-Human Future History series of stories and a shorter series of "Paratime" alternate history tales.