Deák
Deák or Deak is a surname. Notable people with the surname include:
- Adrienn Henczné Deák (1890–1956), Hungarian painter
 - Edit DeAk (1948–2017), née Deak, Hungarian-born American art critic and writer
 - Edward Deak, professor of economics
 - Ferenc Deák (politician) (1803–1876), Hungarian statesman and Minister of Justice
 - Ferenc Deák (footballer) (1922–1998), Hungarian football player
 - István Deák (1926–2023), Hungarian-born American historian, author and academic
 - Jon Deak (born 1943), Hungarian-American double bassist and composer
 - Kristóf Deák (born 1982), Hungarian film director, screenwriter, film producer and editor
 - Ladislav Deák (1931–2011), Slovak historian
 - László Deák (1891–1946), Hungarian army officer who served in World War I and World War II
 - Nicholas Deak (1905–1985), Hungarian-American banker and OSS and CIA agent
 - Stefan Deak (born 1991), Serbian footballer
 - Tamás Deák (composer) (born 1927), composer and conductor for Cat City and Vízisí
 - Tamás Deák (born 1976), stage name Speak, Hungarian rapper, model and actor
 - Zsombor Deak (born 1989), Romanian triathlete
 
See also
- Marcell Deák-Nagy (born 1992), Hungarian sprinter who specialises in the 200 and 400 metres