| Official Name: | Dupeljne |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Upper Carniola |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Central Slovenia |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Lukovica |
| Area Total Km2: | 0.67 |
| Population As Of: | 2002 |
| Population Total: | 51 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 46.1919°N 14.6761°W |
| Elevation M: | 544.3 |
| Footnotes: | [1] |
Dupeljne (in Slovenian pronounced as /ˈduːpəlnɛ/) is a small settlement in the hills north of Lukovica pri Domžalah in the eastern part of the Upper Carniola region of Slovenia.[2]
Dupeljne was first attested in written sources in 1348 as Tewpplach (and in 1353 as zu dem Dupelnik). The old transcriptions are based on a locative plural form, probably based on the plural demonym *Dupljane. The name is derived from the Slovene common noun dupel 'hollow', referring to a local geographical feature.[3]
Dupeljne was mentioned in Johann Weikhard von Valvasor's 17th-century work The Glory of the Duchy of Carniola. He described the local people as speaking a slow dialect and being deliberate thinkers. During the Second World War, locals from Dupeljne helped care for wounded Partisan soldiers and supplied the Partisans' Triglav Hospital (a.k.a. Luk Hospital, Slovenian: Lukova bolnica) near Kolovec. On 13 December 1942, German forces attacked a detachment of Partisans from Kamnik between Kolovec and Dupeljne, who then withdrew to Dupeljne.[4]
Notable people that were born or lived in Dupeljne include: