Caher is an
Irish language word meaning "stone fort", and may refer to:
Historical
- A general term for a ringfort in Ireland
Geography
Towns and townlands
- Cahir (sometimes spelled Caher) a town in South Tipperary in Ireland
- Several historic Electoral divisions in Ireland - including places named "Caher" in Clare, Cork, Kerry, Queen's County (Laois), and Tipperary
- Several Townlands throughout Ireland are also called "Caher"