P.J. Carroll & Company Limited, often called Carroll's, is a tobacco company in Republic of Ireland. It is Ireland's oldest tobacco manufacturer and is now a subsidiary of British American Tobacco Plc. Its cigarette brands were among the best selling in Ireland in the twentieth century. Its factory was for decades the largest employer in Dundalk.
Patrick James Carroll (b. 1803) completed his apprenticeship as a tobacconist in 1824 and opened a shop in Dundalk, later also manufacturing cigars. Patrick James moved to Liverpool in the 1850s. His son Vincent Stannus Carroll expanded the firm in the later 19th century. His son James Marmion Carroll moved to a house outside Dundalk. A second factory was opened, in Liverpool, in 1923. The company went public in 1934.
Carroll's was acquired by Rothmans in 1990; Rothmans was acquired by British American Tobacco Plc in 1998. The company's share of the Irish tobacco market is around 17%. In 2002 the Dundalk site was sold for €16.4m to the Department of Education and repurposed for the campus of Dundalk Institute of Technology. Carroll's rented back a small section for its remaining factory operations, until finally ceasing its Dundalk operations in 2008. Carrolls remains an Irish company with deep connections to hundreds or retirees and nearly 40 staff based in their Dublin offices.
PJ Carroll agrees that the Government should regulate on smoking and health issues; this regulation should be informed, evidence-based, and proportionate. PJ Carroll and BAT acknowledge that smoking is a cause of various serious and fatal diseases, including lung cancer, emphysema, chronic bronchitis and cardiovascular diseases.
In 2013, some lawmakers suggested PJ Carroll should be prohibited from speaking with lawmakers on the basis of the WHO Framework Convention on Tobacco Control (FCTC). PJ Carroll comes under the definition of  Tobacco Industry as set out by the FCTC, but the FCTC does not prohibit engagement between tobacco companies and public representatives, but puts in place strict rules relating to transparency.
- "Carrolls Number 1", its first filter cigarette, was launched in 1958.
- "Carrolls Additive Free* Red" and "Carrolls Additive Free* Blue" was launched in 2013 as additive free* cigarettes started to gain popularity across Western Europe. (*No additives in the tobacco blend does NOT mean a less harmful cigarette)
- "Pall Mall" is one of PJ Carroll's strongest growing brands
- Vogue is PJ Carroll's premium cigarette brand
- "Major", a full flavor cigarette, inspired the name of Twenty Major, a leading Irish blog.
- "Sweet Afton", launched in 1919, was named after "'Afton Waters" by Robert Burns, whose sister Agnes was buried in a graveyard opposite the old Carrolls factory in Church Street, Dundalk. Sweet Afton cigarettes were discontinued in the Autumn of 2011.
Carroll's was a major sponsor of sport in Ireland until restrictions were imposed on tobacco advertising. The company had naming rights over the GAA All Stars Awards (1971–78); the Irish Open in golf (1963–93); and Irish showjumping horses of the 1970s and 80s, such as "Carroll's Boomerang".
- Guider, Ian (5 November 2004). "Carrolls profits slump by €20m". Irish Examiner. Retrieved 20 February 2010.[dead link]
- Bellew, Seamus (26 November 2008). "Carroll's Factory: The Carroll and Burns associations". Dundalk Democrat. Retrieved 20 February 2010.
- McDonald, Frank (22 February 2011). "Dundalk relights fire in former factory". The Irish Times. Retrieved 22 February 2011.[dead link]
- "Carroll's cigarettes – a burnt out case?". Business and Finance (Ireland). 6 May 2004.
- "British American Tobacco/ Health and Science". BAT. Retrieved 21 January 2014.
- "oireachtas/bill-to-outlaw-tobacco-lobbying-defeated-in-seanad". Irish Times. Retrieved 21 January 2014.
- "Article 5.3 FCTC". WHO. Retrieved 21 January 2014.
- "About". Twenty Major. Retrieved 20 February 2010.
- Mc Donnell, Fidelma (23 July 2004). "Riches of Clare: Rewarding the Cream of the Crop". Clare Champion. Retrieved 20 February 2010.
- Parkes, Louise (5 January 2005). "Show jumping mourns Paul Darragh". Irish Independent. Retrieved 20 February 2010. "by the mid-1970s [Paul Darragh] had joined Eddie Macken to compete under the banner of the tobacco company PJ Carroll in a sponsorship deal that ran for 12 long and very successful years."
- P.J. Carroll & Company Limited official website