Mullaghlea (from Irish: Mullach Liath meaning ‘The Grey Hilltop') 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.
Mullaghlea is bounded on the north by Moherloob and Moherreagh townlands and Finaghoo townland in Swanlinbar parish, on the west by Gortullaghan townland and Tawnagh and Prospect townlands in Corlough parish, on the south by Brackley, Templeport townland and on the east by Mullanacre Upper townland in Tomregan parish. Its chief geographical features are Brackley Lough, Polldoo pothole (from Irish: Poll Dubh meaning ‘The Black Hole'), sinkholes, forestry plantations, waterfalls, a stream and dug wells. It forms part of the Slieve Rushen Bog Natural Heritage Area 
Mullaghlea is traversed by the national secondary N87 road (Ireland), minor roads and rural lanes.
The townland covers 529 statute acres.
The 1609 Baronial Map depicts the townland as part of Aghalough.
The 1665 Down Survey map depicts it as Mullagh.
William Petty's 1685 map depicts it as Mullagh.
On 19 January 1586 Queen Elizabeth I of England granted a pardon (No. 4813) to Teig Oge M’Teig M’Tirlagh O Dollan of Aghholagh for fighting against the Queen's forces.
In the Plantation of Ulster by grant dated 26 June 1615, King James VI and I granted, inter alia, one poll in Aghalough to Sir George Graeme and Sir Richard Graeme to form part of the Manor of Greame. An Inquisition held at Cavan Town on 31 October 1627 found that George Greames was seized of one pole in Aghowlogh and he died 9 October 1624. By his will dated 1 May 1615 he left his lands to his son and heir William Greames then 30 years old (born 1594) and unmarried.
The 1662 Hearth Money Rolls show four Hearth taxpayers in Mulaghlea- Farrell McBrien, Neale McEtire, Thomas McGawran and Ternan McKelaghcher.
By grant dated 9 September 1669 King Charles II of England gave Arthur Annesley, 1st Earl of Anglesey, inter alia, the lands of Mullaghleagh with an area of 51 acres at an annual rent of £0-13s-9d.
The Tithe Applotment Books for 1827 list twenty seven tithepayers in the townland.
The 1836 Ordnance Survey Namebooks state- There is a light soil intermixed with sand & lime stone (the latter of which is burned and used for manure).
Griffith's Valuation of 1857 lists fifteen landholders in the townland.
In the 1901 census of Ireland, there are ten families listed in the townland, and in the 1911 census of Ireland, there are only eight families listed in the townland.
The book Bawnboy and Templeport History Heritage Folklore by Chris Maguire gives the following description of Brackley school, which was actually located in the townland of Mullaghlea, not Brackley- Brackley National School 1826-1966: Teachers- Mrs. Mealiff ca. 1900; Miss Harkness 1903-'4; Robert Hall 1905-'7; Robert Smith 1907-'8; Mr. Close 1908-13; Maudie Kells 1913-14; Maud Stewart 1914-18; Isabella Hall 1918-20; Mrs. Foster 1921-29; Mrs. Coffey 1929-53; Miss Lattimer, short time; Miss Byers 1954-56; Mrs. Coffey 1 year; Miss Byers 1957-58; Mrs Knott 1958-1966 when Brackley School closed.
A description by a schoolboy of Brackley School in the 1930s is viewable online.
The chief structures of historical interest in the townland are
- Toberpatrick (St.Patrick’s Holy Well) which was used as a place of pilgrimage until the 1890s.
- A late Bronze Age penannular bronze bracelet
- A stone axehead
- Brackley School
- Stepping stones over the stream