Vajda is a Hungarian language surname. In medieval times, vajda was the equivalent of voivode, meaning a "war-leader" or "war-lord". The name may refer to:
Anna Vajda (born 1984), Hungarian basketball playerÁrpád Vajda (1896–1967), Hungarian chess playerAttila Vajda (born 1983), Hungarian athleteEdward Vajda (born 1958), American linguistErnest Vajda (1886–1954), Hungarian actorGéza Vajda (born 1950), Hungarian orienteerGregory Vajda (born 1973), Hungarian musicianGyörgy Mihály Vajda (born 1935), Hungarian philosopherJános Vajda (poet) (1827–1897), Hungarian poetJános Vajda (composer) (born 1949), Hungarian composerJaroslav Vajda (1919–2008), American hymn composerLadislao Vajda (1906–1965), Hungarian film directorLadislaus Vajda (1878–1933), Hungarian screenwriterLajos Vajda (1908–1941), Hungarian painterMarián Vajda (born 1965), Slovak tennis playerPatrik Vajda (born 1989), Slovak football playerSteven Vajda (1901–1995), Hungarian mathematicianSzidonia Vajda (born 1979), Romanian chess player