Welsh Assembly Constituency
| End Date | Company | Client | LAB | PC | CON | LD | UKIP | Lead |
| 07 Sep 2017 | YouGov Online | ITV Wales/Cardiff Uni | 43 | 19 | 25 | 5 | 4 | +18 |
| 06 Jan 2017 | YouGov Online | ITV Wales/Cardiff Uni | 31 | 21 | 25 | 8 | 12 | +6 |
| 21 Sep 2016 | YouGov Online | ITV Wales/Cardiff Uni | 34 | 20 | 24 | 6 | 13 | +10 |
| 04 Jul 2016 | YouGov Online | ITV Wales/Cardiff Uni | 32 | 23 | 19 | 7 | 16 | +9 |
| 02 Jun 2016 | YouGov Online | ITV Wales/Cardiff Uni | 34 | 23 | 18 | 7 | 15 | +11 |
| 05 May 2016 | YouGov Online | ITV Wales/Cardiff Uni | 31 | 19 | 21 | 8 | 16 | +10 |
| 04 May 2016 | YouGov Online | ITV Wales/Cardiff Uni | 33 | 19 | 21 | 8 | 16 | +12 |
| 22 Apr 2016 | YouGov Online | ITV Wales/Cardiff Uni | 33 | 21 | 19 | 8 | 15 | +12 |
| 11 Apr 2016 | YouGov Online | ITV Wales/Cardiff Uni | 35 | 21 | 19 | 6 | 17 | +14 |
| 11 Feb 2016 | YouGov Online | ITV Wales/Cardiff Uni | 34 | 19 | 22 | 5 | 18 | +12 |
| 04 Dec 2015 | YouGov Online | ITV Wales | 35 | 20 | 23 | 5 | 15 | +12 |
| 24 Sep 2015 | YouGov Online | ITV Wales | 39 | 18 | 23 | 6 | 13 | +16 |
| 26 Jun 2015 | YouGov Online | ITV Wales | 35 | 20 | 23 | 4 | 15 | +12 |
| 06 May 2015 | YouGov Online | ITV Wales | 35 | 21 | 22 | 6 | 12 | +13 |
| 09 Mar 2015 | YouGov Online | ITV Wales | 37 | 20 | 22 | 6 | 11 | +15 |
| 21 Jan 2015 | YouGov Online | ITV Wales | 34 | 18 | 21 | 7 | 13 | +13 |
| 05 Dec 2014 | YouGov Online | ITV Wales | 35 | 19 | 22 | 6 | 12 | +13 |
| 11 Sep 2014 | YouGov Online | ITV Wales | 36 | 19 | 21 | 6 | 12 | +15 |
| 01 Jul 2014 | YouGov Online | ITV Wales | 39 | 19 | 20 | 8 | 13 | +19 |
| 22 Apr 2014 | YouGov Online | IPPR/Cardiff Uni/Edinburgh Uni | 41 | 20 | 21 | 8 | 7 | +20 |
| 12 Feb 2014 | YouGov Online | ITV Wales | 42 | 19 | 21 | 9 | 5 | +21 |
| 04 Dec 2013 | YouGov Online | ITV Wales | 43 | 20 | 19 | 9 | 7 | +23 |
| 22 Jul 2013 | YouGov Online | Elections in Wales Blog | 47 | 17 | 19 | 8 | 6 | +28 |
| 20 Feb 2013 | YouGov Online | ITV Wales | 46 | 17 | 21 | 10 | 5 | +25 |