Joshua William Allen, 6th Viscount Allen MA (c. 1782 – 21 September 1845) was an Irish peer, the son of Joshua Allen, 5th Viscount Allen. He succeeded to the titles of 6th Viscount Allen, County Kildare, and 6th Baron Allen of Stillorgan, on 1 February 1816.
He never married, and on his death his titles became extinct.
| Peerage of Ireland | ||
|---|---|---|
| Preceded by Joshua Allen |
Viscount Allen 1816–1845 |
Succeeded by Title Extinct |