Kassai

Kassai may refer to:
 * Kassai (surname)
 * Kassai and Luk, a children's television series
 * Apostolic Prefecture of Upper Kassai, a mission territory in Central Africa
 * Kessai Note, president of the Marshall Islands
 * Kasai River, a tributary of the Congo River in central Africa
 * Qassab, a Muslim ethnic group in north India and Pakistan