| Official Name: | Gretteåsen |
| Settlement Type: | Village |
| Pushpin Map: | Norway Vestfold#Norway |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location of the village |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Eastern Norway |
| Subdivision Name2: | Vestfold |
| Subdivision Type3: | District |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Tønsberg Municipality |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Area Total Km2: | 0.09 |
| Population As Of: | 2023 |
| Population Total: | 233 |
| Population Density Km2: | 2697 |
| Postal Code Type: | Post Code |
| Postal Code: | 3176 Undrumsdal |
| Coordinates: | 59.3713°N 10.3509°W |
| Elevation M: | 79 |
| Elevation Footnotes: | [1] |
Gretteåsen is a village in Tønsberg Municipality in Vestfold county, Norway. The village is located about north of the city of Tønsberg, about west of the city of Horten, and about east of the village of Revetal. The European route E18 highway and the Undrumsdal Church are both located about east of the village.
The 0.09km2 village has a population (2023) of 233 and a population density of .[2]