Cardiganshire (UK Parliament constituency)

Ceredigion
County constituency for the House of Commons
Boundary of Ceredigion in Wales.
Preserved county	Dyfed
Population	75,922 (2011 census)
Electorate	57,556 (March 2014)
Current constituency
Created	1536
Member of parliament	Mark Fraser Williams (Liberal Democrat)
Number of members	One
Overlaps
Welsh Assembly	Mid and West Wales
European Parliament constituency	Wales

Ceredigion, formerly Cardiganshire, is a constituency represented in the House of Commons of the Parliament of the United Kingdom. Created in 1536, the boundaries have remained remarkably unchanged for nearly five centuries. From 1536 until 1885 there were two single-member constituencies, one being a county constituency (Cardiganshire) comprising the rural areas, and the other being a borough constituency (Cardigan District of Boroughs) comprising a number of separate towns; in 1885 the borough constituency was abolished, and its towns and electors incorporated into the county constituency. The towns which comprised Cardigan Boroughs varied slightly over this long period, but primarily consisted of Cardigan, Aberystwyth, Lampeter and Adpar, the latter now a suburb of Newcastle Emlyn across the River Teifi, in Carmarthenshire.

The county constituency was enlarged in 1983 with the addition of part of Pembrokeshire, being renamed Ceredigion and Pembroke North. In 1997 it reverted to its former boundaries, being renamed Ceredigion.

The Ceredigion Welsh Assembly constituency was created with the same boundaries in 1999.

The boundaries of this constituency mirror almost exactly those of the county of Ceredigion.

Under proposed constituency boundary changes announced in September 2016, ahead of the next general election, the seat's boundaries will be extended. The seat, which has the proposed name of Ceredigion and North Pembrokeshire, includes all of the current Ceredigion constituency, the northern part of the current Preseli Pembrokeshire constituency, a small part of Carmarthen West and South Pembrokeshire around the village of Dre-fach Felindre, as well the south-western part of Montgomeryshire around Llanidloes.