Sven Julius Risom (Copenhagen, 3 November 1880 — Hillerød, 24 March 1971) was a Danish architect who worked mainly in the style of Nordic Classicism.
After time at the Technical University of Denmark (during which he studied under Gustav Vermehren and Emil Blichfeldt), he later attended the Royal Danish Academy of Fine Arts, graduating with a degree in architecture in 1909.
From 1905 to 1906, he was employed by Hermann Baagøe Storck as co-supervisor (along with Andreas Clemmensen and Ulrik Plesner) of the restoration of St. Bendt's Church in Ringsted.
Risom then worked for the Association of 3 December 1892, a group dedicated to historic preservation, leading a 1906 survey of older Danish architecture.
In addition to his work as a practicing architect, Risom served as an external examiner of the Royal Danish Academy of Fine Arts from 1917; was a member of the board of the Architects' Association of Denmark 1920–21; and from 1933, oversaw the inventories of items at the inhabited residences of the Danish monarch, for which service, he was made a Knight of the Order of the Dannebrog.