| Official Name: | Lopaca |
| 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: | Savinja |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Šentjur |
| Area Total Km2: | 1.77 |
| Population Total: | 136 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] [2] |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 46.1242°N 15.4765°W |
| Elevation M: | 501.6 |
| Footnotes: | [3] |
Lopaca (in Slovenian pronounced as /lɔˈpaːtsa/) is a village in the Municipality of Šentjur in eastern Slovenia. It lies just off the regional road leading south out of the town of Šentjur towards Kozje. The settlement, and the entire municipality, are included in the Savinja Statistical Region, which is in the Slovenian portion of the historical Duchy of Styria.[4]
The local parish church is dedicated to Saint Anne and belongs to the Roman Catholic Diocese of Celje. It was built in the early 19th century on the site of a 15th-century predecessor.[5]