Make Room! Make Room! is a 1966 science fiction novel written by Harry Harrison exploring the consequences of both unchecked population growth on society and the hoarding of resources by a wealthy minority. It was originally serialized in Impulse magazine.

Harry Max Harrison was an American science fiction author, known mostly for his character The Stainless Steel Rat and for his novel Make Room! Make Room! (1966). The latter was the rough basis for the motion picture Soylent Green (1973). Long resident in both Ireland and the United Kingdom, Harrison was involved in the foundation of the Irish Science Fiction Association, and was, with Brian Aldiss, co-president of the Birmingham Science Fiction Group.