General Knut Gillis Bildt (13 July 1854 – 13 October 1927) was a Swedish Army officer and politician.

After having passed the cadet course at the Military Academy Karlberg in 1869-71, Bildt was commissioned as underlöjtnant in the Life Regiment Dragoon Corps in 1871 and was three years later promoted to lieutenant there.

In 1883 he also was appointed to be a teacher at the Royal Swedish Army Staff College and remained on this post until he, in 1890, advanced to ryttmästare in the Life Regiment Dragoons.

Bildt was also a member of the 1907 Special Defense Committee, within which he put in an extremely successful and appreciated work, although he was eventually forced to see a reconciliation proposal adopted, for which he did not consider himself able to give his vote.

[1] Bildt's activities in the General Staff, he had presented in Härordningslärans grunddrag : härordningen i allmänhet (1885), which can be said to be an overview of the basic principles of contemporary German war science.

In the tactics, Bildt sought to adapt modern views to the country's special conditions, for example through in-depth trials with winter warfare in northern Sweden's mountain and forest terrain, coastal and border defense, operations in the dark, exercises in long-term war and heavy artillery use in mobile warfare, as well as several technical news.