Killytoney (locally [ˌkʲïləˈtӧni], from Irish Coill an Tonnaigh, meaning 'wood of the stockade'[2]) is a townland lying within the civil parish of Kilcronaghan, County Londonderry, Northern Ireland.

It lies in the center of the parish, and is bounded by the townlands of Calmore, Cloughfin, Coolsaragh, Gortamney, Killynumber, and Moyesset.

[3] The first element of the name Killytoney can be either from the Irish words coill (wood) or cill (church), which are indistinguishable in anglicistions due to their pronunciation.

Despite this all previous authorities including Irish language scholar John O'Donovan support the derivation from coill.

The Place-Names of Northern Ireland project agrees with this derivation citing that a rath formerly lay within this townland, and that a stockade may have been part of this structure or near it.