Haan is surname of Dutch origin (Dutch spelling of German: Hahn). People with this name include:
- Arie Haan (b. 1948), Dutch professional football player and manager
- Edmond Haan (1924–2018), French professional football player
- Gijsbert Haan (1801–1874), Dutch-American religious leader, founder of the Christian Reformed Church in the United States and Canada
- Khar Haan (b. 1955), African-European businessman, founder of the Socialist Party of Amsterdam
- William G. Haan (1863–1924), American army officer during WWI