Vajda is a Hungarian language surname. It is derived from Proto-Slavic *vojevoda. In medieval times, vajda was the equivalent of voivode, meaning a "war-leader" or "war-lord". Notable people with the surname include:

• Anna Vajda (born 1984), Hungarian basketball player

• Árpád Vajda (1896–1967), Hungarian chess player

• Attila Vajda (born 1983), Hungarian athlete

• Botond Vajda (born 2004), Hungarian footballer

• Christopher Vajda (born 1955), British jurist

• Edward Vajda (born 1958), American linguist

• Ernest Vajda (1886–1954), Hungarian actor

• Georges Vajda (1908–1981), French historian and islamologist

• Géza Vajda (born 1950), Hungarian orienteer

• Gregory Vajda (born 1973), Hungarian musician

• Huba Vajda (born 2000), Hungarian handball player

• Ivan Vajda (born 1978), Croatian tennis player

• János Vajda, multiple people

• Jaroslav Vajda (1919–2008), American hymn composer

• Ladislao Vajda (1906–1965), Hungarian film director

• Ladislaus Vajda (1878–1933), Hungarian screenwriter

• László Vajda (figure skater) (born 1954), Hungarian figure skater

• Lajos Vajda (1908–1941), Hungarian painter

• Levente Vajda (born 1981), Romanian chess grandmaster

• Marián Vajda (born 1965), Slovak tennis coach and former player

• Markó vajda (1580–1629), Prince of Moldavia better known as Marcu Cercel

• Mihály András Vajda (1935–2023), Hungarian philosopher

• Oršoja Vajda (born 1997), Serbian footballer

• Patrik Vajda (born 1989), Slovak footballer

• Stěpan Vajda (1922–1945), Czechoslovak officer

• Steven Vajda (1901–1995), Hungarian mathematician

• Szidonia Vajda (born 1979), Romanian chess player

• Thomas Vajda, American diplomat

• Vivi Vajda (born 1964), Swedish paleontologist

See also

• Wajda