| Official Name: | Grabučiškės |
| Settlement Type: | Village |
| Timezone1: | EET |
| Timezone Dst: | EEST |
| Utc Offset: | +2 |
| Utc Offset Dst: | +3 |
| Population Total: | 134 |
| Population As Of: | 2021[1] |
| Subdivision Type: | Country |
| Subdivision Type1: | Ethnographic region |
| Subdivision Name1: | Aukštaitija |
| Subdivision Type2: | County |
| Subdivision Name2: | Kaunas County |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Kaišiadorys district municipality |
| Subdivision Type4: | Eldership |
| Subdivision Name4: | Rumšiškės eldership |
| Pushpin Map: | Lithuania |
| Pushpin Map Caption: | Location of Grabučiškės |
| Coordinates: | 54.897°N 24.153°W |
Grabučiškės is a village in the Kaišiadorys District Municipality, Lithuania, located in the Kauno Marios Regional Park, 5 kilometers northwest of Rumšiškės, by the Jokūbiniai stream. Located near the highway, by the shore of Kaunas Reservoir, there is a rest area. A wooden cross was built at the entrance to the village. The village is surrounded by the Rumšiškės Forest.
Most of the inhabitants of Gastilonys moved to Grabučiškės in around 1960, when the Kaunas Reservoir was dammed.