| Ellertshaar | |
| Native Name Lang: | nl |
| Settlement Type: | Hamlet |
| Image Map1: | Map NL - Borger-Odoorn - Ellertshaar.png |
| Map Caption1: | Ellertshaar in the municipality of Borger-Odoorn. |
| Pushpin Map: | Netherlands Drenthe#Netherlands |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in the Netherlands |
| Coordinates: | 52.9°N 50°W |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | Drenthe |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Borger-Odoorn |
| Elevation Footnotes: | [1] |
| Elevation M: | 17 |
| Area Total Km2: | 2.38 |
| Population Footnotes: | [2] |
| Population Total: | 30 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Population Density Urban Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 9535 |
| Area Code Type: | Dialing code |
| Area Code: | 0599 |
Ellertshaar is a hamlet in the Dutch province of Drenthe. It is a part of the municipality of Borger-Odoorn, and lies about 17 km southeast of Assen.
The hamlet was first mentioned in 1851 as Eldershaar, and means "alder trees on a sandy ridge".[3] Ellershaar was home to 8 people in 1840.[4]