Christian Peder Grønbech Gierløff (6 June 1879 - 21 August 1962) was a Norwegian economist, town planner and a prolific writer.

[1] He is known for his activities in the interwar period, when he planned the urban garden ("hageby") movement, co-operating among others with state architect Sverre Pedersen.

[citation needed] Gierløff released several books, and was especially interested in housing questions, urbanism and social policies.

From 1929 Gierløff also worked as secretary at the Norwegian Institute of Technology, and held lectures on town planning.

He biographed Hans E. Kinck, Thomas Bennett, Bjørnstjerne Bjørnson, Tryggve Andersen, Peter Wessel Tordenskiold in addition to personal friends Edvard Munch and Knut Hamsun.