Karl Martin Norum (1852—1911) was a Norwegian architect, best known for his many church buildings, as well as contributions to the reconstruction after the fire in the city of Ålesund in 1904.

In 1880, he was hired as a draftsman for the architectural firm of Jakob Digre in Trondheim.

[1] In 1886, he was hired as the chief architect and designer for the architectural firm of Jakob Digre, where he worked earlier in his career.

[2] In Trondheim, Norum was also the designer of a number of public and industrial buildings such as the Britannia Hotel (1895), Mathesongården (1898), Hjorten Revue and Variety Theater restaurant (1899), the Bødtker family's villa Kvernbekken (1902), the local Masonic Lodge, Trondheim hospital on Øya (1902), the main post office (1911), and Tollboden (1911).

He also designed the commercial building "Carl E. Rønneberg & Sønner" on Noteneset.