The Slovene Prealps or the Slovenian Prealps (Slovene: Slovenske Predalpe, Predalpska Slovenija, slovenski predalpski svet) are a group of mountain ranges in the eastern part of the Alps.

They are located in Slovenia and, for a small part of their northernmost area, in Austria.

[citation needed] According to SOIUSA (International Standardized Mountain Subdivision of the Alps) the Slovene Prealps are an Alpine section, classified in the following way:[1] The Slovene Prealps are divided into three non-contiguous subsections: Two of these subsections include just one Alpine supergroup, and the third one is further subdivided in two supergroups:[2] The chief summits of the Slovene Prealps are: