Jezersko is located in the remote Kokra Valley in the Kamnik–Savinja Alps, south of the Seeberg Saddle mountain pass and the border with the Austrian state of Carinthia.

The name of the area derives from a glacial lake near the settlement of Zgornje Jezersko that started to disappear after an earthquake in 1348.

[2] It gave the area its German name Seeland (literally "lake land", first recorded as Seelant in 1496), and its Slovene equivalent Jezersko, which came into use at the end of the 19th century.

The remote village was part of the Duchy of Carinthia until 1919, administratively linked to Eisenkappel in the north; however, the residents did not consider themselves "true" Carinthians.

[3] It was therefore the only settlement already ceded by the Carinthian Landtag assembly to the newly established State of Slovenes, Croats and Serbs, before it was officially adjudicated together with the Meža Valley and Dravograd to the Kingdom of Serbs, Croats and Slovenes by the 1919 Treaty of Saint-Germain.