Molnár (or Molnar) is a Hungarian surname meaning "miller". The name may be a loanword from the Slavic mlynar (with the same meaning), which is also the same in Belarusian (млынар); however, it is most likely derived from the Old Germanic Mulinari.

The word itself shares a common ancestry with numerous similar surnames across Europe, such as the Dutch Molenaar, the Italian Molinari, the Danish and Norwegian Møller, and the Spanish Molinero, all meaning “miller”.

Molnár was the name of one of Hungary’s most iconic playwrights, Ferenc Molnár (1878-1952).

Other people with the name include:

• Albert Szenczi Molnár (1574–1634), Hungarian Calvinist pastor, linguist, philosopher, poet, religious writer and translator
• Antal Molnár (1890–1983), Hungarian musicologist; hu:Molnár Antal
• Balázs Molnár (born 1977), Hungarian footballer
• Charles Molnar (1935–1996), American electrical engineer and computer developer
• Charley Molnar (born 1961), American football coach
• C. Pál Molnár/Pál C. Molnár (1894–1981); hu:Molnár C. Pál
• Chris Molnar (born 1987), American writer, editor and publisher
• Csilla Molnár (1969–1986), Hungarian beauty queen, crowned Miss Hungary 1985
• Endre Molnár (born 1945), Hungarian water polo player
• Erika Molnar (born 1976), Hungarian athlete
• Farkas Molnár (1897–1945), Hungarian architect, painter, essayist, and graphic artist.
• Ferenc Molnár (disambiguation)
  • Ferenc Molnár (born Ferenc Neumann 1878–1952), Jewish Hungarian (later US) writer
  • Ferenc Molnár (football manager) (1885–?), football player and later manager
  • Ferenc Molnár (footballer) (1891–?), football player and later manager in Italy
  • Ferenc Molnár (athlete) (1904–?), Hungarian Olympic athlete
  • Ferenc Zoltán Molnár (1943–1967), U.S. Army soldier and Medal of Honor recipient
  • Ferenc Molnár (singer) (born 1982), known professionally as “Caramel”; winner of the second series of Megasztár
• Fritz M. de Molnár (fl. 20c), Hungarian International Scout Commissioner
• George Molnar (1910–1998), Australian cartoonist
• George Molnar (philosopher) (1934 – 1999), Australian
• Gergely Molnár (born 1950), a Hungarian; hu:Molnár Gergely
• Géza Molnár (1923–2011), Hungarian writer; hu:Molnár Géza
• György Molnár (1901–1977), Hungarian footballer
• Imre Lakatos (known as Imre Molnár for a time), philosopher
• Ingo Molnár, Hungarian Linux kernel hacker
• István Molnár (1913–1983, Galánta), water polo player and Olympian
• István Molnár (chemist) (born 1950), chemist and translator hu:Molnár István (műfordító)
• József Molnár (1821–1899), Hungarian painter
• József Molnár (1918–2009), Hungarian writer
• Marie-Claude Molnar (born 1983), Canadian paralympic athlete
• Miklos Molnar (born 1970), Danish football (soccer) player
• Mónika Molnar (hu:Mónika Molnár)
• Mária Molnár (born 1966), Hungarian art critic
• Ninoslav Molnár, secular name of Ñāṇamoli (Serbian monk) (born 1983), Buddhist monk
• Pavol Molnár (1936–2021), Slovak football player
• Péter Molnár (disambiguation)
  • Péter Molnár (academic), Hungarian academic and former politician
  • Péter Molnár (footballer) (born 1983), football goalkeeper from Slovakia who currently plays for Paksi SE
  • Peter Molnar (geophysicist), professor in geological sciences
  • Péter Molnár (canoeist) (born 1986), Olympic Hungarian canoeist
• Ralph E. Molnar, Australian paleontologist and museum curator
• Steve Molnar (1947–2021), player of Canadian football*
• Tamás Molnár (born 1975), Hungarian water polo player
• Thomas Molnar (1921–2010), Catholic philosopher, historian and political theorist
• Tibor Molnár (1921–1982), Hungarian film actor
• Vera Molnár (1924–2023), artist of Hungarian origin
• Zoltán Molnár (footballer, born 1971), Hungarian footballer
• Zoltán Molnár (footballer, born 1973), Hungarian footballer
• Zoltán Molnár (rower) (born 1961), Hungarian rower