| Official Name: | Spodnja Idrija |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Inner Carniola |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Gorizia |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Idrija |
| Area Total Km2: | 7.23 |
| Population As Of: | 2002 |
| Population Total: | 1860 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 46.0314°N 14.0256°W |
| Elevation M: | 314.9 |
| Footnotes: | [1] |
Spodnja Idrija (in Slovenian pronounced as /ˈspoːdnja ˈiːdɾija/, in older sources also Idrija pri Fari;[2] German: Unteridria[2]) is a settlement on the right bank of the Idrijca River in the Municipality of Idrija[3] in the traditional Inner Carniola region of Slovenia.[2]
The name Spodnja Idrija means 'lower Idrija'. This distinguished the town from Idrija, which lies upriver and about 20m (70feet) higher in elevation, and which was formerly known as Zgornja Idrija 'upper Idrija' (German: Oberidria).[2] [4]
The parish church in the settlement is dedicated to the Assumption of Mary and belongs to the Koper Diocese.[5] It is locally known as the Church of Mary on the Rock (Slovenian: Cerkev Marije na Skalci). A chapel is mentioned on the site in written sources from 1132. The church was built in the 15th century and rebuilt around 1674 in the Baroque style.[6]