Músaem Chontae Dhún na nGall | |
 Displays within Donegal County Museum | |
  Location within Ireland | |
| Established | 1987 |
|---|---|
| Location | Letterkenny, County Donegal, Ireland |
| Coordinates | 54°57′17″N 7°44′06″W / 54.9546°N 7.7349°W |
| Type | County museum |
Donegal County Museum (Irish: Músaem Chontae Dhún na nGall) is a county museum in County Donegal in Ireland. Located on the High Road in Letterkenny, the museum building was completed in 1843 as the Warden's House of the Letterkenny Workhouse. The building was repurposed as a museum in the late 20th century.