Spodnja Šiška (pronounced [ˈspoːdnja ˈʃiːʃka]; German: Unterschischka[1]) is a formerly independent settlement in the northwest part of the capital Ljubljana in central Slovenia.

The phonological change of H- > Š- may be due to Upper Carniolan palatalization, discontinuous assimilation, or both.

The semantic motivation of the name is attributed to a single small house that originally stood in the settlement.

In 1382, a peace treaty between the Republic of Venice and Leopold III of Habsburg was signed in front of St. Bartholomew's Church in Spodnja Šiška, whereby the Austrians agreed to return the city of Trieste.

[10] Spodnja Šiška was annexed by the City of Ljubljana in 1914, ending its existence as an independent settlement.