| Official Name: | Reštanj |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Styria |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Lower Sava |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Krško |
| Area Total Km2: | 9.34 |
| Population As Of: | 2002 |
| Population Total: | 241 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 46.0432°N 15.4829°W |
| Elevation M: | 420.3 |
| Postal Code: | 8281 |
| Footnotes: | [1] |
Reštanj (in Slovenian pronounced as /ɾɛˈʃtaːn/, in older sources also Raštanj,[2] German: Reichenstein[2]) is a dispersed settlement in the hills north of Senovo in the Municipality of Krško in eastern Slovenia. The area is part of the traditional region of Styria. It is now included in the Lower Sava Statistical Region.[3]
The local church is built on a hill in the eastern part of the settlement and is dedicated to Saint Jodocus (Slovenian: sveti Jošt). It belongs to the Parish of Koprivnica. It is a Gothic building that was restyled in the Baroque in the 18th century.[4]
On a hill north of the settlement are the ruins of Reštanj Castle. It was mentioned in written documents dating to 1235. It was destroyed during the Croatian–Slovene Peasant Revolt in 1573 and never rebuilt.[5]