Tullamore Dew, rendered in most branding as Tullamore D.E.W., is a brand of Irish Whisky produced by William Grant & Sons. It is the second-largest-selling brand of Irish whiskey globally, with sales of over 1,500,000 cases per annum as of 2020.
The whiskey was originally produced in Tullamore, County Offaly, Ireland, at the old Tullamore Distillery which was established in 1829. Its name is derived from the initials of Daniel E. Williams (D.E.W.), a general manager and later owner of the original distillery. In 1954, the original distillery closed down, and with stocks of whiskey running low, the brand was sold to John Powers & Son, another Irish distiller in the 1960s, with production transferred to the Midleton Distillery, County Cork in the 1970s following a merger of three major Irish distillers.
In 2010, the brand was purchased by William Grant & Sons, who constructed a new distillery on the outskirts of Tullamore. The new distillery opened in 2014, bringing production of the whiskey back to the town after a break of sixty years.
In 2012, a visitor centre was opened in a refurbished bonded warehouse previously belonging to the original distillery. The centre offers guided tours and tutored tastings ranging from 50 minutes to 5 hours in duration.