Alexandre Marie Auguste Jamar (6 November 1821 – 15 August 1888) was a Belgian businessman, liberal politician, and former governor of the National Bank of Belgium (NBB) from 1882 until 1888.
Born in Brussels on 6 November 1821, Jamar started his career at the age of 17, when he became a partner in the family printing business of his brother.
In 1870 he became the director of the NBB and in 1882 the governor of the National Bank of Belgium.
During his time in office, he had to deal with the consequences of an economic depression.
In addition he had to deal with problems within the Latin Monetary Union, caused by the refusal of Belgium to sign the new convention of 1885.