Halvor Vreim (12 August 1894 – 6 February 1966) was a Norwegian architect who contributed to the documentation, conservation and restoration of old wooden buildings.

Vreim was born in Bø, Telemark to farmer Gunnar Helgeson Vreim and Anne Jonsdotter Li.

[1] Vreim started his career as a carpenter, and also studied theoretical and historical aspects of the profession.

His works include Norwegian Decorative Art To-day from 1937, Norsk trearkitektur from 1939, and Laftehus from 1940.

He was decorated Knight, First Class of the Order of St. Olav in 1963.