Wanjala is a surname. Notable people with the surname include:
Doris Wanjala (1966–2007), Kenyan volleyball player Salome Wanjala (born 1985), Kenyan volleyball player Smokin Wanjala, Kenyan lawyer and associate justice of the Supreme Court of Kenya Tecla Namachanja Wanjala (born 1962), Kenyan conflict resolution, post-conflict rehabilitation, and development worker