Largely depopulated during the Migration Period, the first Slavic settlement came into existence in the 8th century,[2] when a gród fortification was erected in the area.

[3] According to the Cedynia website, the "Name of city appears in documents under oldest written records already in the year 972 as Cidini, in 1187 as Zedin and Cedene, in 1240 as Ceden. "

On 24 June 972, the first historically recorded battle of the Polan dukes, the Battle of Cedynia, took place at this location: the Piast duke Mieszko I of Poland and his brother Czcibor defeated the invading forces of the Saxon count Odo I, who then ruled as a margrave in the Saxon Eastern March (Lusatia).

With adjacent Lubusz Land in the south, the town became a part of the Neumark acquisitions of the Ascanian margraves John I and of Otto III of Brandenburg in 1248/52.

In 1641 the Hohenzollern elector Frederick William of Brandenburg had the western wing of the nunnery's ruin rebuilt as a Baroque hunting lodge.

In the last weeks of World War II, in March 1945, the town was conquered by joint Soviet and Polish forces during the Vistula-Oder offensive.

The officially protected traditional foods and beverages of Cedynia and its surroundings are the Cedynia acacia honey (akacjowy miód cedyński),[5] and two types of local Polish mead: trójniak cedyński[6] and trójniak Czcibor[7] (as designated by the Ministry of Agriculture and Rural Development of Poland).