List of breweries in Ireland

This is a list of breweries in Ireland. Brewing has a long history in Ireland; the country's largest city, Dublin, is home to one of the largest breweries in the world, St James's Gate Brewery, founded by Arthur Guinness more than 250 years ago.

With Irish people being the world's sixth biggest drinkers of beer, there has been plenty of opportunity for new breweries to gain a share of the market, and a wide range of craft beers began appearing in the early years of the current century, produced at microbreweries and in brewpubs across the country.

Operational breweries
As of mid-2018, in addition to international/macro-breweries such as Guinness and Heineken, there were 75 independent craft breweries in operation in the Republic of Ireland, with around 35 in operation in Northern Ireland. They include:

Notes on mergers and defunct breweries

 * Achill Island Brewery, Achill Island, Bunacurry, Mayo, 2014-2017
 * Beamish and Crawford (Heineken), Cork, 1792–2009 : relocated to Murphy's Brewery
 * Boyne Brewhouse, Drogheda, 2016–2019, some brands bought by O'Haras and resumed
 * Carrig Brewery, Drumshanbo, active from 2011–2019, merged with Brú Brewery in 2019 and the brewing operation moved to the latter's brewery in 2019. In late 2021, Brú Brewery and Galway Bay Brewery merged, but announced that brewing would continue in both breweries.
 * J.W. Sweetman, established under that ownership in 2013 as a Dublin brewpub in 2013, has changed ownership.
 * Lett's Brewery, Enniscorthy, 1864–1956. Still licensed and firm still exists but brewery inoperative.
 * Macardle Moore Brewery (Diageo), Dundalk - 1850-2000
 * Smithwick's (Diageo), Kilkenny, 1710–2013 : relocated to St. James's Gate