| Official Name: | Ydstebøhamn |
| Other Name: | Ystabøhamn |
| Settlement Type: | Village |
| Pushpin Map: | Rogaland#Norway |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location in Rogaland county |
| Subdivision Type: | Country |
| Subdivision Name: | Norway |
| Subdivision Name1: | Western Norway |
| Subdivision Name2: | Rogaland |
| Subdivision Type3: | District |
| Subdivision Name3: | Ryfylke |
| Subdivision Type4: | Municipality |
| Subdivision Name4: | Kvitsøy |
| Utc Offset1: | +01:00 |
| Utc Offset1 Dst: | +02:00 |
| Area Total Km2: | 0.35 |
| Population As Of: | 2019 |
| Population Total: | 374 |
| Population Density Km2: | 1069 |
| Postal Code Type: | Post Code |
| Postal Code: | 4180 Kvitsøy |
| Elevation M: | 6 |
| Elevation Footnotes: | [1] |
| Coordinates: | 59.0622°N 5.4022°W |
Ydstebøhamn or Ystabøhamn is the administrative centre of Kvitsøy municipality in Rogaland county, Norway. The village is located on the southern shore of the island of Kvitsøy. The village has a ferry quay which receives regular ferries from the town of Skudeneshavn on the island of Karmøy across the Boknafjorden to the north, and to the village of Mekjarvik in Randaberg municipality across the Kvitsøyfjorden on the mainland to the south. The planned Rogfast undersea tunnel will connect Kvitsøy to the mainland to the north and south as part of the government's goal of providing a ferry-free European route E39 highway along the west coast of Norway.
The 0.35km2 village has a population (2019) of 374, giving the village a population density of . This means that over 70% of the municipal population lives in the village.[2]
The village is an important fishing port, especially focusing on shellfish. The Kvitsøy Lighthouse lies atop a small hill on the northwestern edge of the village.[3]