The Klaipėda Revolt took place in January 1923 in the Klaipėda Region (Memel Territory, Memelland). The region, located north of the Neman River, was detached from the East Prussia of the German Empire by the Treaty of Versailles and became a mandate of the League of Nations. It was placed under provisional French administration until a more permanent solution could be worked out. Lithuania wanted to unite with the region (part of Lithuania Minor) due to its large Lithuanian-speaking minority of Prussian Lithuanians and major port of Klaipėda (Memel) – the only viable access to the Baltic Sea for Lithuania. As the Conference of Ambassadors favored leaving the region as a free city, similar to the Free City of Danzig, the Lithuanians organized and staged the revolt. Presented as an uprising of the local population, the revolt met little resistance from either the German Police or the French Army. The rebels established a pro-Lithuanian administration, which petitioned to unite with Lithuania citing the right of self-determination. The League of Nations accepted the fait accompli and the Klaipėda Region was transferred as an autonomous territory to the Republic of Lithuania on February 17, 1923. After prolonged negotiations a formal international agreement, the Klaipėda Convention, was signed in May 1924. The convention formally acknowledged Lithuania's sovereignty in the region and outlined its extensive legislative, judicial, administrative, and financial autonomy. The region remained part of Lithuania until March 1939 when it was transferred to Nazi Germany after the German ultimatum.

Klaipėda (pronounced [ˈklaɪpeːda] ( listen); German: Memel) is a city in Lithuania situated at the mouth of the Danė River where it flows into the Baltic Sea. It is the third largest city in Lithuania and the capital of Klaipėda County.

The city has a complex recorded history, partially due to the combined regional importance of the Port of Klaipėda, a usually ice-free port on the Baltic Sea, and the Akmena - Danė River. It has been controlled by the Teutonic Knights, the Duchy of Prussia, the Kingdom of Prussia, the German Empire, the Entente States immediately after World War I, Lithuania as a result of the 1923 Klaipėda Revolt, and the Third Reich following the 1939 German ultimatum to Lithuania. The city was incorporated into Lithuania during its tenure as a Soviet Socialist Republic and has remained within Lithuania following its re-establishment as an independent state.

The population shrank from 207,100 in 1992 to 177,823 in 2011. Popular seaside resorts found close to Klaipėda are Nida to the south on the Curonian Spit, and Palanga to the north.