O'Hara's Brewery, officially known as Carlow Brewing Company, is one of Ireland's pioneering craft breweries. Founded in 1996 by brothers Seamus O'Hara and his family, the brewery is located in Bagenalstown, County Carlow, in the heart of Ireland's historical malt-growing region. As an independent, family-owned operation, O'Hara's has played a central role in shaping the Irish craft beer landscape from its earliest days, long before the craft beer movement gained mainstream momentum across the country. O'Hara's is best known for its range of traditional Irish beer styles, with a strong focus on stouts and ales that pay homage to Ireland's deep brewing heritage. Their Irish Dry Stout, brewed at 4.3% ABV, is a flagship example of the style — dark, roasty, and sessionable. The brewery also produces an Irish Red Ale and has expanded its portfolio to include brands such as McGargles, Solas, Grafters, and The Crafty Brewing Company, demonstrating a broad approach to craft brewing across multiple styles and audiences. Today, O'Hara's stands as the largest craft brewery in Ireland and has grown its reach internationally, including launching products such as the Irish Red Nitro in cans on the US market. The brewery remains family-owned at its core, with a strategic investment from Spanish family-owned brewer Hijos de Rivera further supporting its continued growth.