Commemorative Medal of the Reign of King Leopold II

The Commemorative Medal of the Reign of King Leopold II (French: Médaille Commémorative du Règne du Roi Léopold II, Dutch: Herinneringsmedaille aan de Regeerperiode van Leopold II) was a Belgian civilian and later military and police forces medal originally established on 21 July 1905 by royal decree to commemorate the 40th year of the reign of King Leopold II.

The medal was initially awarded to civil servants with a minimum of 20 years of honourable service between 1865 and 1905 who were eligible for the Civic Decoration for long service. It was reissued slightly modified (see description below) in 1951 at the request of veterans' groups, to veterans and military personnel who had a minimum of one year's good and faithful service between 16 December 1865 and 18 December 1909. The medal was once again reissued for a third time in 1952, again slightly modified, to members and veterans of the Force Publique who also had a minimum of one year's good and faithful service between 1 July 1885 and 18 December 1909. The one year's minimum service requirement was later removed by royal decrees in 1959 and 1960.