| Gallmannsegg | |
| Pushpin Map: | Austria |
| Pushpin Mapsize: | 270 |
| Pushpin Map Caption: | Location within Austria |
| Coordinates: | 47.1572°N 15.0964°W |
| Subdivision Type: | Country |
| Subdivision Name: | Austria |
| Subdivision Type1: | State |
| Subdivision Name1: | Styria |
| Subdivision Type2: | District |
| Subdivision Name2: | Voitsberg |
| Parts Style: | para |
| Area Total Km2: | 32.87 |
| Population Total: | 305 |
| 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: | VO |
| Postal Code Type: | Postal code |
| Postal Code: | 8573 |
| Area Code Type: | Area code |
| Area Code: | 03148 |
Gallmannsegg is a former municipality in the district of Voitsberg in the Austrian state of Styria. Since the 2015 Styria municipal structural reform, it is part of the municipality Kainach bei Voitsberg.[2]
Gallmannsegg lies about 30 km northwest of Graz and southeast of the Speikkogel. The river Kainach has its source in the municipality.