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Lorrha (from Irish: Lothra) is a small village at the northern tip of County Tipperary, Ireland. It is located on a local minor road between the R489 Birr to Portumna road and the N65 Nenagh to Portumna road about five kilometres (three miles) east of the point where the River Shannon enters Lough Derg. It is a townland and a civil parish in the historical  barony of Ormond Lower. The civil parish borders Portumna in County Galway and Birr in County Offaly. Lorrha is also an Ecclesiastical parish in the Roman Catholic Diocese of Killaloe. The proposed new Dáil constituency of Offaly will incorporate twenty four electoral divisions from Tipperary North including Lorrha East and Lorrha West.
In 843 a Norse expedition led by Turgesius raided Lorrha and neighbouring Terryglass. Close to an historic crossing point of the River Shannon, the area has a long history of bridges and ferry crossings. The present Portumna bridge dates from 1911  (opening section replaced October 2008 )
Lorrha has a rich ecclesiastical history evidenced by the ruins within the village. Beside the Roman Catholic Church (c. 1912), at the south of the village are the remains of a Dominican Friary founded in the 13th century by Walter de Burgh, Earl of Ulster. To the east of the village stands the Church of Ireland  on the site of St. Ruadhan's church which was built c. 1000 AD and was itself built on the site of St. Ruadhan's Abbey, founded in the 6th century. Remains of two 8th-century high crosses stand in the churchyard. The Augustinian Abbey founded in the 12th century by the Order of Canons Regular stands nearby. The carved head over the door is thought to represent the wife of Walter De Burgh. Water for the monastic settlement was supplied from St. Ruadhan's well located south of the road that passes the present Church of Ireland cemetery.
- AI707.2 Colmán, abbot of Lothra, rested.
- AI747a.1 Kl. Repose of Dúngal, abbot of Lothra. The slaying of Aed Dub.
- AI780.1 Kl. Repose of Ailill, abbot of Lothra.
- AI809.1 Kl. Coibdenach the learned, abbot of Lothra, [rested].
- AI1015.10 The vacating of Imlech Ibuir, and the invasion of Lothra.
- Lackeen Castle, A Kennedy stronghold occasionally open to the public (built 12th century, rebuilt 16th century). It was here that the Lorrha Missal was rediscovered inside a stone wall in the 18th century.
- Ruadán mac Fergusa Birn, 6th century founder and first abbot of the monastery of Lorrha.
- Cú Connacht mac Dundach, King of Síol Anmchadha, (died 1006 near Lorrha).
- Martin O'Meara VC (born 1882 in Sharragh, Lorrha), recipient of the Victoria Cross.
- Martin Charles Reddington (born 1919), retired Irish sportsperson who played hurling for Lorrha-Dorrha GAA.
- Liam King (born 1940 in Lorrha) retired Irish sportsperson.
- John McIntyre (born 1961 in Lorrha) Irish hurling manager and former player.
- James Kenneth Hogan (born 1963 in Lorrha), current Irish hurling manager and former player.
- Patrick (Bonner) Maher (born 1989), current Irish sportsperson playing on the Tipperary senior hurling team
- Placenames Database of Ireland (see archival records)
- Parishes of Killaloe Diocese.
- "Constituency Commission Report 2012 – Waterford - Tipperary - Laois - Offaly - Kildare area" (PDF). Constituency Commission. 14 July 2012.
- AU 845.2; CS 845; CGG 19; AClon 842 [=845]; AI 844.1 [=845].
- Wallace, Patrick F., O'Floinn, Raghnall eds. Treasures of the National Museum of Ireland: Irish Antiquities, 2002, Gill & Macmillan, Dublin, ISBN 0-7171-2829-6