Géza Csáth (né József Brenner) was a Hungarian writer, playwright, musician, music critic and psychiatrist. He was the cousin of Dezső Kosztolányi.
Géza Csáth (pen name of József Brenner) was a writer, critic, music theoretician and medical doctor. A competent violinist even as a child, he originally wanted to be a painter, but his teachers criticised his drawing, so he turned to writing. He was barely fourteen years old when his first writings on music criticism were published. After grammar school he moved from his native Szabadka (now Subotica in Serbia) to Budapest in order to study medicine. While at college he wrote short sketches and reviews for newspapers and magazines. He was among the first to laud the work of Bartókand Kodály.