Valdemar Ingemann (21 February 1840 – 10 October 1911) was a prolific Danish architect active during the late 19th and early 20th century.

Valdemar Ingemann was born in Copenhagen, the son of merchant and perfume manufacturer Søren Edvard Joachim Ingemann, nephew of the author Bernhard Severin Ingemann, and Mariane Aurelia Laurentine née Lauritzen.

He completed a mason's apprenticeship and was prior to that, in October 1856, admitted to the Royal Danish Academy of Fine Arts where he won the large silver medal (1863) before graduating in 1866.

[1] Ingemann worked as a draughtsman for Harald Conrad Stilling and Johan Henrik Nebelong before setting up his own practice.

Ingemann also served on the Copenhagen City Council from 1894 to 1900.