János Bókai (né Bock János; 18 May 1822 – 20 October 1884) was a Hungarian academic, professor, pediatrician and the director of a children's hospital in Budapest. He also pioneered rhino-laryngology and the development of laryngoscopy and rhinoscopy.
He wrote the anamnesis of Ignaz Semmelweis which played a role in the admission of Semmelweis to an insane asylum, where he died.
His sons were János Bókay Jr. and Árpád Bókay, both medical doctors.