Caerphilly county borough
Geography
Area: - Total - % Water	Ranked 16th 278 km² ? %
Admin HQ:	Hengoed
ISO 3166-2:	GB-CAY
ONS code:	00PK
Demographics
Population: - Total (April 29, 2001) - Density	Ranked 5th 169,519 610 / km²
Ethnicity:	98.8% White.
Welsh language: - Any skills	Ranked 17th 16.7%
Politics
Caerphilly County Borough Council http://www.caerphilly.gov.uk
Control:	Labour Party
MPs:	Wayne David Dai Havard Don Touhig

Caerphilly is a county borough in southern Wales, straddling the boundary between the traditional counties of Glamorgan and Monmouthshire. Its main town is Caerphilly. Other towns in the county borough are Bedwas, Risca, Ystrad Mynach, Newbridge, Blackwood, Bargoed, New Tredegar and Rhymney.

The county borough was formed on April 1, 1996 by the merger of the Rhymney Valley district of Mid Glamorgan with the Islwyn borough of Gwent.