Inishowen West
Inishowen West 
    Inis Eoghain Thiar (Irish)  | |
|---|---|
Barony map of County Donegal, 1900; Inishowen West is in the northeast, coloured yellow.  | |
| Coordinates: 55°4′N 7°21′W / 55.067°N 7.350°W | |
| Sovereign state | Ireland | 
| Province | Ulster | 
| County | Donegal | 
| Area | |
 • Total  | 310.91 km2 (120.04 sq mi) | 
Inishowen West (Irish: Inis Eoghain Thiar), also called West Inishowen or Innishowen West, is a barony in County Donegal, Ireland. Baronies were mainly cadastral rather than administrative units. They acquired modest local taxation and spending functions in the 19th century before being superseded by the Local Government (Ireland) Act 1898.