Mullaghmore (from Irish: Mullach Mór meaning 'Great Summit') 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.
Mullaghmore is bounded on the north by Lakefield, Templeport townland, on the west by Owengallees and Gowlagh South townlands, on the south by Cloncurkney townland and on the east by Kildoagh and Kilsob townlands. Its chief geographical features are Bellaboy Lough, Lakefield Lough, a stream, a wood and spring wells.
Mullaghmore is traversed by minor roads and rural lanes.
The townland covers 205 statute acres.
Up until the late 18th century Mullaghmore was included in the modern townland of Cloncurkney as a subdivision, so its history is the same until then. The strip of land separating Bellaboy Lough from Lakefield Lough was known as Rus or Roscoo (from Irish: either Ros Cunga meaning 'The Wood of the Narrow Strip of Land' or Ros Cú meaning 'The Wood of the Hound').
In the Hearth Money Rolls of 1662 there were no people paying the Hearth Tax in Mullaghmore.
The Reverend Veaitch Betty of Lakefield, Templeport by his will dated 16 July 1783 (Born 1709. Died August 1785. Probate granted July 1796) stated- To be buried in the vault I made at Temple Piert. To my dear wife Mary Betty the houses and demesne of Lakefield with the mill race and ten acres whereon the mill is built provided she keeps unmarried, and after her demise to my eldest son Rowland Betty. To my daughters, Susanna Betty and Ann Betty, £300 each to be paid out of the lands of Kilsob. To my second son William Betty the farm of land known as Middle Kilsob or Gortenane, and his heirs. To my eldest son Rowland Betty the lands of Newtown known by the name of Tony McCallan, the farm of Lower Kilsob and the farm of Mullaghmore, the above lands not to be taken over until my debts and the children's fortunes are paid. Should either son die without male heirs then to the elder surviving daughter of either. To my said son William Beatty the lease of Gortnacarrig, County Cavan, made to me by the Right Honourable Lord Farnham and the lease of Lavaghmore, Co. Leitrim, made to me by Samuel Campbell, Esq. To my granddaughter Isabella Simpson twenty pounds to be paid by her uncle William Betty when she marries or comes of age. Ten shillings each to the poorest widows or orphans of Templepiert and Drumreilly. A debt of nearly £100 is owed to me by Rev. Mr. Swanne.