Erraran (from Irish: Airearan, meaning "land bordering a Lake") is a townland in the civil parish of Templeport, County Cavan, Ireland. It lies in the Roman Catholic parish of Templeport and barony of Tullyhaw.
Erraran is bounded on the north by Derrymony and Killyneary townlands, on the west by Tirnawannagh and Gortnacargy townlands in Corlough parish, on the south by Newtown, Templeport and Kilsob townlands and on the east by Bawnboy townland. Its chief geographical features are Brackley Lough, Lough Namoyle, a stream and dug wells.
Erraran is traversed by minor roads and rural lanes.
The townland covers 155 statute acres.
The 1609 Baronial Map depicts the townland as Brurin.
The 1665 Down Survey map depicts it as Errierrin.
In the Hearth Money Rolls of 1662 there were no people paying the Hearth Tax in Erraran.
A grant dated 30 January 1668 was made by King Charles II of England to John French in ye pole of Araron containing 25 acres and 2 roods at an annual rent of £0- 6s-10 1/2d.
A grant dated 9 September 1669 from King Charles II of England to Arthur Annesley, 1st Earl of Anglesey included, inter alia, part of Urrierren containing 53 acres at an annual rent of £0-14s-3 1/2d and in the same 13 acres at £0-3s-6d.
A deed dated 24 December 1720 between Morley Saunders and John Enery includes the lands of Uraran.
The Tithe Applotment Books for 1827 list one tithepayer in the townland.
Griffith's Valuation of 1857 lists seven landholders in the townland.
In the 1901 census of Ireland, there are four families listed in the townland, and in the 1911 census of Ireland, there are still four families listed in the townland.
There don’t appear to be any structures of historical interest in the townland apart from a graphitised iron cauldron which was found near a crannog in multiple fragments.