Sean's Bar is a pub in Athlone, Ireland. It claims to be the oldest pub in Ireland, dating back to 900, and received a certificate from Guinness World Records repeating the claim.
Sean's Bar is located on Main Street, Athlone, on the West Bank of the River Shannon, and was originally known as Luain's Inn. It is often colloquially referred to simply as Sean's.
During renovations in 1970, the walls of the bar were found to be made of wattle and wicker, dating back to the ninth century. Old coins minted by landlords for barter with their customers from this period were also found.