This is a List of Welsh principal areas by the percentage of those professing some skills in the Welsh language in the 2001 UK census.

The census produced[1] a detailed breakdown of skills as:

• Understands spoken Welsh (no other skills)
• Speaks but does not read or write Welsh
• Speaks and reads but does not write Welsh
• Speaks, reads and writes Welsh
• Other combination of skills
• No knowledge of Welsh

For the purpose of this table, all combinations other than "No knowledge of Welsh" have been combined.

Rank	Area	Welsh %
1	Gwynedd	76.1
2	Anglesey	70.4
3	Carmarthenshire	63.6
4	Ceredigion	61.2
5	Conwy	39.7
6	Denbighshire	36.0
7	Powys	30.1
8	Pembrokeshire	29.4
9	Neath Port Talbot	28.8
10	Wrexham	22.9
11	Swansea	22.5
12	Flintshire	21.4
13	Rhondda Cynon Taff	21.1
14	Bridgend	19.9
15	Merthyr Tydfil	17.7
16	Vale of Glamorgan	16.9
17	Caerphilly	16.7
18	Cardiff	16.3
19	Torfaen	14.5
20	Newport	13.4
21	Blaenau Gwent	13.3
22	Monmouthshire	12.9

See also

• List of Welsh principal areas by population
• List of Welsh principal areas by area