The Great People's Assembly of the Serb People in Montenegro, commonly known as the Podgorica Assembly, was an ad hoc popular assembly convened in November 1918, after the end of World War I in the Kingdom of Montenegro. The assembly was organized by a committee supported by and coordinating with the government of the Kingdom of Serbia. The committee convened the assembly with the aim of facilitating an unconditional union of Montenegro and Serbia and removing king Nikola I of Montenegro from the throne. The unification preceded the establishment of the Kingdom of Serbs, Croats and Slovenes as a unified state of South Slavs by mere days. The unification was justified by the need to establish a single Serbian state for all Serbs, including Montenegro whose population as well as its king felt that it belonged to the Serbian nation and largely supported the unification.

The Kingdom of Montenegro was a monarchy in southeastern Europe, present-day Montenegro, during the tumultuous period of time on the Balkan Peninsula leading up to and during World War I. Officially it was a constitutional monarchy, but absolutist in practice. On 28 November 1918, following the end of World War I, with the Montenegrin government still in exile, the Podgorica Assembly proclaimed unification with the Kingdom of Serbia, which itself was merged into the Kingdom of Serbs, Croats and Slovenes three days later, on 1 December 1918. This unification with Serbia lasted, through various successor states, for almost 88 years, ending in 2006.