Portumna (Irish: Port Omna- meaning 'the landing place of the oak') is a market town in the south-east of County Galway, Ireland, on the border with and linked by a bridge to County Tipperary. The town is located to the west of the point where the River Shannon enters Lough Derg. This historic crossing point over the River Shannon between counties Tipperary and Galway has a long history of bridges and ferry crossings. On the south-western edge of the town lie Portumna Castle and Portumna forest park.
Portumna Castle is a semi-fortified house in Portumna, County Galway, Ireland which was built in the early 17th century by Richard Burke, 4th Earl of Clanricarde.
Oldthort or Oultort (Irish: Olltóir) is a townland near Portumna, County Galway, Ireland, mainly along the Tynagh Road. Oultort townland has an area of 1.86 square kilometres (0.72 sq mi), and had a population of 70 people as of the 2011 census.
Portumna Abbey is a medieval Cistercian (and later Dominican) friary and National Monument located in Portumna, Ireland.