This scoping review brings together existing studies on the use of cats in animal-assisted interventions, as assistance animals and as companion animals for autistic people. A systematic search across PubMed, CINAHL and Scopus in September 2022 identified 13 articles from 12 studies meeting the selection criteria with analysis revealing two key findings, cat-assisted therapeutic interventions, and cats as companion animals. There were five themes that emerged: the characteristics and behaviours of cats that make them suitable for inclusion in homes with autistic people; the bond between the cat and the autistic person; the use of cats as human-substitutes; the multiple ways in which cats improved the lives and social functioning of autistic people; and, some noted drawbacks or considerations of cat ownership. The review generates a comprehensive knowledge base upon which to promote feline therapy in autism and to advocate for further targeted research.