Haan is surname of Dutch origin (Dutch spelling of German: Hahn). People with this name include:
Arie Haan (born 1948), Dutch football player and manager
Edmond Haan (1924–2018), French football player
Gijsbert Haan (1801–1874), Dutch-American religious leader, founder of the Christian Reformed Church in the United States and Canada
William G. Haan (1863–1924), American army officer during WWI


