| Official Name: | Dolnji Ajdovec |
| 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: | Lower Carniola |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Southeast Slovenia |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Žužemberk |
| Area Total Km2: | 5.12 |
| Population As Of: | 2002 |
| Population Total: | 63 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 45.8291°N 15.0122°W |
| Elevation M: | 435.4 |
| Footnotes: | [1] |
Dolnji Ajdovec (pronounced as /sl/, in older sources Dolenja Ajdovica,[2] de|Unterhaidowitz[2]) is a village in the Municipality of Žužemberk in southeastern Slovenia. The area is part of the historical region of Lower Carniola. The municipality is now included in the Southeast Slovenia Statistical Region.[3]
The local parish church is dedicated to the Holy Trinity (sl|Sveta Trojica) and belongs to the Roman Catholic Diocese of Novo Mesto. It was built in the 1990s.[4]