Newcastle Brown Ale is a leading brand of beer. It was originally brewed in Newcastle upon Tyne, UK, in April 1927 by Newcastle Breweries, which became Scottish & Newcastle in 1960 . S&N UK is now a division of Heineken International.

In August 2005, Scottish and Newcastle closed the Tyne Brewery, the last consignment of Brown Ale having been brewed in April of that year. Production was moved across the river to the former Federation Brewery in Gateshead.

Newcastle Brown Ale had originally been granted Protected Geographical Indication (PGI) status by the EU. Since Scottish and Newcastle moved production outside of the city its PGI has been removed.

In Newcastle, the beer is often called 'Dog' (or simply 'Broon'). The 'Dog' name comes from the euphemism "I'm going to walk the dog" - meaning "I'm going to the pub" - and was further popularised by a 1980s advertising campaign. It is often referred to as Newcy Brown.

Newcastle Brown Ale is traditionally sold in England by the pint (20 fl oz, 568 ml) and more recently in 500 ml (17.6 fl oz, 0.88 pint) bottles. Typically the ale is consumed from a 12 fl oz 'Wellington' glass. This allows the drinker to regularly top-up the beer and thereby maintain a frothy 'head'. In the United States, it is sold in standard 12 fl oz (355 ml) bottles. It is also available in 550ml bottles.