Parliamentary elections were held in Bulgaria to elect members of the XXV Ordinary National Assembly on 24 December 1939, although voting continued in some areas into January 1940. The elections were officially held on a non-partisan basis with the Bulgarian Agrarian National Union and Bulgarian Communist Party banned, and in a process tightly controlled by Tsar Boris III, by then the real power in the country. However, candidates representing parties did contest the elections. Pro-government candidates won a majority of seats. Voter turnout was 67.2%.
Bogdan Filov was appointed as Prime Minister after the election. The government signed the anti-Jewish Law for Protection of the Nation, the and the pro-fascist Brannik youth organization were formed. In 1940 the Treaty of Craiova was signed, returning control of Southern Dobruja to Bulgaria. The country joined the Tripartite Pact and World War II on 1 March 1941, with a 140 to 20 vote in the Assembly. Boris III died on 28 August 1943 and a regency for his son Simeon II was established. Filov became a regent and was succeeded as PM by Dobri Bozhilov and later by Ivan Bagryanov. As soviet troops were about to enter the country, the regency allowed the formation of a government of the pro-Allied democratic opposition under Konstantin Muraviev, however it was overthrown by the Fatherland Front seven days later in the 9 September coup.
127 of the 160 MPs in the XXV National Assembly were tried in the People's Court, (111 were present, 7 tried in absentia and 9 had died), with 67 sentenced to death, in addition to the three regents (Filov, Prince Kiril and Nikola Mihov) and the Prime Ministers Bozhilov and Bagryanov, amongst others.