Helen DeWitt is an American novelist. She is the author of the novels The Last Samurai (2000) and Lightning Rods (2011) and the short story collection Some Trick (2018) and, in collaboration with the Australian journalist Ilya Gridneff, has written Your Name Here. She lives in Berlin.

The Last Samurai (2000) is the first novel by American writer Helen DeWitt. It follows a single mother and her young son, a child prodigy, who embarks on a quest to find his father. Despite selling well and garnering critical acclaim on publication, it was out of print for almost a decade; when reissued in 2016, it received renewed praise and accolades.