Yes, Jackie Chan is a black belt. He attained a black belt in Hapkido.
Jackie Chan's martial arts journey includes significant training and achievement. After entering the film industry, he, along with Sammo Hung, had the opportunity to train in Hapkido under the guidance of Grand Master Jin Pal Kim. Through this training, Chan eventually earned his black belt in the discipline.
Beyond Hapkido, Jackie Chan is renowned for his mastery of various forms of Kung Fu, which he extensively showcases in his iconic film career. His diverse martial arts background contributes significantly to his unique acrobatic fighting style.
For more details on his life and career, you can refer to his Wikipedia page.