Tarmonbarry, officially Termonbarry (Irish: Tearmann Bearaigh, meaning "St Barry's sanctuary"), is a village in County Roscommon, Ireland. It is located where the N5 National primary route crosses the River Shannon. East of the bridge part of the village lies in County Longford. The 2002 Census stated that the village had less than 100 people. The 2006 Census saw that number rise to 518. This is in no small part to the Rural Renewal Tax Scheme which affects the area.