Killywaum (from Irish: Coill an Mháma meaning ‘Wood of the Chasm) 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.
Killywaum is bounded on the north by Corneen and Gowlagh North townlands, on the west by Killycrin and Kilsallagh townlands and on the southwest by Munlough North townland. Its chief geographical features are a stream and cow pastures. The Ordnance Survey Namebooks for 1836 state- There is a light soil intermixed with boulders of free stone.
Killywaum is traversed by the national secondary N87 road (Ireland), minor roads and rural lanes.
The townland covers 102 statute acres.
Until the 19th century Killywaum formed part of the modern townland of Kilsallagh, so its history is the same until then.
The Tithe Applotment Books for 1827 list seventeen tithepayers in the townland.
Griffith's Valuation of 1857 lists fourteen landholders in the townland.
In the 1901 census of Ireland, there are three families listed in the townland, and in the 1911 census of Ireland, there are only two families listed in the townland.
There don't seem to be any structures of historical interest in the townland.
Coordinates: 54°04′31″N 7°48′37″W / 54.07514°N 7.810271°W