Dinefwr (also written Dynefwr and anglicised as Dynevor) may refer to:

Places[edit]

• District of Dinefwr, a local government district of Dyfed, Wales, from 1974 to 1996
• Carmarthen East and Dinefwr (UK Parliament constituency), created in 1997
• Carmarthen East and Dinefwr (Assembly constituency), created in 1999
• Dinefwr Castle, a Welsh castle near Llandeilo, Carmarthenshire
• Dinefwr Park National Nature Reserve
• Plas Dinefwr, a country house now called Newton House, Llandeilo

People[edit]

• Baron Dynevor
• House of Dinefwr, a royal house of Wales