COMPASS-XP is a dataset of matched photographic and X-ray images of single objects, made available for use in Machine Learning & Computer Vision research, in particular in the context of transport security. Objects are imaged in multiple poses, and accompanied by metadata including labels for whether we consider the object to be dangerous in the context of aviation. Object classes overlap with those in the popular ImageNet Large Scale Visual Recognition Challenge class set and the WordNet lexical database, and identifiers for shared classes in both schemes are also provided.