Drumbo (Irish derived place name, Droim Bó meaning 'The Hill-Ridge of the Cows'.) is a townland in the civil parish of Kildallan, barony of Tullyhunco, County Cavan, Ireland.
Drumbo is bounded on the north by Feugh (Bishops) townland, on the west by Drumbagh and Drummully West townlands, on the south by Drummully East townland and on the east by Gorteen (Gorteenagarry) townland. Its chief geographical features are small streams and a well. Drumbo is traversed by the local L5503 road, minor public roads and rural lanes. The townland covers 157 acres.
From medieval times up to the early 1600s, the land belonged to the McKiernan Clan.
The 1609 Plantation of Ulster Map depicts the townland as Drombo. A government grant of 1610 spells the name as Drombo. A 1629 Inquisition spells the name as Drombo and Dromboe.
In the Plantation of Ulster King James VI and I by grant dated 23 July 1610 granted the Manor of Clonyn or Taghleagh, which included one poll of Drombo, to Sir Alexander Hamilton of Innerwick, Scotland. On 29 July 1611 Arthur Chichester, 1st Baron Chichester and others reported that- '. An Inquisition held at Cavan on 10 June 1629 stated that the poll of Drombo contained four sub-divisions named Shanwillebanne, Coultubber, Achininvekille and Achinnebrouke. It also described the boundary of the townland as- '.
In the Hearth Money Rolls compiled on 29 September 1663 there was one Hearth Tax payer in Drombo- James Moore.
The 1790 Cavan Carvaghs list spells the townland name as Drumboe.
The 1825 Tithe Applotment Books list ten tithepayers in the townland.
In 1832 one person in Drumboe was registered as a keeper of weapons- Joshua Finlay who had one gun and one pistol.
The Drumbo Valuation Office books are available for April 1838.
Griffith's Valuation of 1857 lists eleven landholders in the townland.
The landlord of Drumbo in the 19th century was Hugh Wallace.
In the 1901 census of Ireland, there were six families listed in the townland.
In the 1911 census of Ireland, there were seven families listed in the townland.