House Indoril is one of the initial seven Great Houses of Morrowind. After being founded during the early part of the First Era, Indoril was one of the strongest Houses with vast political power and many influential positions, due to its close ties to the Tribunal. It was the house of Chimer hero Lord Indoril Nerevar. Duke-Prince Indoril Brindisi Dorom was ruling Mournhold during its destruction by Mehrunes Dagon.
This time of influence came to an abrupt halt at the end of the Second Era. After the Armistice between Lord Vivec and Tiber Septim in 2E 896, many of House Indoril's leading members chose to commit suicide rather than accept the treaty. The Lord High Councilor of the Grand Council, himself an Indoril, rejected the treaty, and refused to step down. He was then assassinated in a plot, and replaced by a Hlaalu noble. Emboldened by the success of their new Imperial allies, House Hlaalu embraced the opportunity to settle some old scores with House Indoril, and a number of local councils and land holdings changed hands in bloody feuds. All these events caused House Indoril to lose power rapidly, and it was left severely weakened during the period of transition to Imperial rule.
The remaining members of House Indoril retreated into positions in the Tribunal Temple hierarchy. The predominately Indoril militant order, the Ordinators, protects Vivec and other Temple and Indoril holdings. Its main resources being tied up in Guard duty and the maintenance of defenses against Dagoth Ur, House Indoril, although not without influence, is far from its former glory.
Currently, House Indoril has no territorial holdings on the island of Vvardenfell. Indoril District occupies the heartland of mainland Morrowind, with lands south of the Inner Sea including the city of Almalexia or Mournhold, and the town of Necrom on the eastern coast with its City of the Dead. Indoril territory borders House Dres and the Deshann Plain.
In the game Oblivion, citizens of Cyrodiil speak of House Indoril being in ruins as the result of machinations of the new king, Hlaalu Helseth, and his House Hlaalu and House Dres allies.