Prince Leopold of Belgium, Duke of Brabant, Count of Hainaut (12 June 1859 – 22 January 1869), was the second child and only son of King Leopold II of Belgium and his wife, Marie Henriette of Austria, and heir apparent to the Belgian throne.

At the time of his birth, his grandfather Leopold, formerly a Prince of Saxe-Coburg and Gotha, was the reigning king of Belgium.

At his son's funeral, King Leopold II "broke down in public, collapsing to his knees beside the coffin and sobbing uncontrollably.

"[1] Prince Leopold's body was interred at the royal vault at the Church of Our Lady of Laeken in Brussels.

After the birth of yet another daughter, Clémentine, in 1872, the couple abandoned all hopes of ever having another son and their already strained marriage broke down completely.