Haldor Topsøe

Haldor Topsøe may refer to:


 * Haldor Topsøe (1842–1935), Danish chemist and crystallographer
 * Haldor Topsøe (1913–2013), Danish engineer
 * Haldor Topsøe (company), Danish catalysis company founded in 1940 by Haldor Topsøe (1913–2013)