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Tír Oirill (Irish)
Barony of Tirerril, Co. Sligo.png
Country Ireland
Province Connacht
County Sligo
  Land306.8 km2 (118.5 sq mi)

Tirerill (Tír Oirill) is a barony in east Co. Sligo. [1] It corresponds to the ancient túath of Tir Ollíol. [2]

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  1. "Sligo History Project - Cairbre Drumcliabh". Allismotion.webs.com. Retrieved 26 April 2014.
  2. "Sligo History Project - Tir Olliol". Allismotion.webs.com. Retrieved 26 April 2014.