Hubert Ansiaux (Ixelles, 24 November 1908 – Uccle, 9 April 1987) was a governor of the National Bank of Belgium (NBB) from 1957 until 1971.
In 1941 Hubert Ansiaux left for the United States of America, and in the same year he was appointed as director in London, where he was to succeed Camille Gutt.
After the war, he was in charge of the NBB's Foreign Affairs department and he was closely involved in the post-war currency reform (Operation Gutt).
Hubert Ansiaux was involved in setting up the International Monetary Fund where he would later advocate the creation of the special drawing rights.
As governor of the NBB Ansiaux continued to play a leading role in European monetary cooperation.