| Schloßberg | |
| Settlement Type: | Former municipality |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 46.62°N 15.47°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Styria |
| Subdivision Type2: | District |
| Subdivision Name2: | Leibnitz |
| Parts Style: | para |
| Area Total Km2: | 29.31 |
| Elevation M: | 346 |
| Population Total: | 1076 |
| Population As Of: | 1 January 2016 |
| Population Footnotes: | [1] |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Registration Plate: | LB |
| Postal Code Type: | Postal code |
| Postal Code: | 8463 |
| Area Code Type: | Area code |
| Area Code: | 03454 |
| Website: | www.schlossberg. steiermark.at |
Schloßberg (Slovene: Gradišče) is a former municipality in the district of Leibnitz in the Austrian state of Styria. Since the 2015 Styria municipal structural reform, it is part of the municipality Leutschach an der Weinstraße.[2] Before World War One, it had an ethnic Slovene majority: according to census of 1910, 50.2% of the population was Slovene speaking, and 49.8% was German speaking.