Henning Astrup (6 June 1864 – 7 December 1896) was a Norwegian architect.

He was born in Kristiania (now Oslo, Norway) to city captain (stadshauptmann) Harald Astrup and Johanne Emilie Smith.

[2] His sister Hanna (1869–1933) was married to politician Peter Andreas Morell.

[3] Astrup graduated from the Königliche Technische Hochschule in Berlin (today Technische Universität Berlin.

[4] He cooperated professionally with architect Henrik Nissen, and among their designs were Speilsalen of the Grand Hotel in Oslo[1] the Calmeyer Street Mission House from 1891, and Frimurerlogens stamhus (Lodge of the Freemasons) from 1894.