- the capital of Wales, situated in the southeast, in Cardiff county borough: formerly an important port; seat of the Welsh assembly (1999); university (1883). Pop: 292 150 (2001)
- a county borough in SE Wales, created in 1996 from part of South Glamorgan. Pop: 315 100 (2003 est). Area: 139 sq km (54 sq miles)
Welsh name: Caerdydd