Conrad Caspar Hauser (16 February 1743 – 14 December 1824) was a Swiss-Danish merchant, developer and philanthropist.

He contributed to the rebuilding of Copenhagen after the British bombardment of the city in 1807, building many of the houses on Hauser Plads which was later named after him.

[1] Hauser became acquainted with the Danish envoy in Algier, Andreas Æreboe, and later married his sister.

He was of assistance to a number of Danish naval ships stationed in the Mediterranean Sea and in 1776, upon recommendation of admiral Simon Hooglant, he was appointed as Royal Danish Agent with the title of kommerceråd on condition that he would establish a trading house in Kiel.

After the bombardment of Copenhagen in 1807, Hauser purchased a number of lots with destroyed buildings in the area between Kultorvet and the street Åbenrå.