Welsh Assembly Regional
| End Date | Company | Client | LAB | PC | CON | LD | UKIP | GRN | Lead |
| 07 Sep 2017 | YouGov Online | ITV Wales/Cardiff Uni | 40 | 19 | 23 | 5 | 5 | +17 | |
| 06 Jan 2017 | YouGov Online | ITV Wales/Cardiff Uni | 28 | 20 | 22 | 7 | 14 | +6 | |
| 21 Sep 2016 | YouGov Online | ITV Wales/Cardiff Uni | 29 | 21 | 22 | 6 | 13 | +7 | |
| 04 Jul 2016 | YouGov Online | ITV Wales/Cardiff Uni | 29 | 24 | 18 | 6 | 15 | +5 | |
| 02 Jun 2016 | YouGov Online | ITV Wales/Cardiff Uni | 32 | 21 | 18 | 6 | 14 | 4 | +11 |
| 05 May 2016 | YouGov Online | ITV Wales/Cardiff Uni | 30 | 21 | 19 | 6 | 16 | 4 | +9 |
| 04 May 2016 | YouGov Online | ITV Wales/Cardiff Uni | 31 | 20 | 20 | 6 | 16 | 4 | +11 |
| 22 Apr 2016 | YouGov Online | ITV Wales/Cardiff Uni | 29 | 22 | 19 | 8 | 15 | 4 | +7 |
| 11 Apr 2016 | YouGov Online | ITV Wales/Cardiff Uni | 31 | 20 | 20 | 5 | 16 | 4 | +11 |
| 11 Feb 2016 | YouGov Online | ITV Wales/Cardiff Uni | 31 | 19 | 22 | 4 | 18 | 3 | +9 |
| 04 Dec 2015 | YouGov Online | ITV Wales | 34 | 18 | 23 | 4 | 16 | 4 | +11 |
| 24 Sep 2015 | YouGov Online | ITV Wales | 34 | 18 | 24 | 5 | 14 | 4 | +10 |
| 26 Jun 2015 | YouGov Online | ITV Wales | 32 | 20 | 22 | 5 | 14 | 4 | +10 |
| 06 May 2015 | YouGov Online | ITV Wales | 32 | 20 | 22 | 6 | 13 | 3 | +10 |
| 09 Mar 2015 | YouGov Online | ITV Wales | 33 | 21 | 22 | 5 | 12 | 5 | +11 |
| 21 Jan 2015 | YouGov Online | ITV Wales | 32 | 15 | 20 | 8 | 16 | 8 | +12 |
| 05 Dec 2014 | YouGov Online | ITV Wales | 31 | 19 | 20 | 6 | 15 | 7 | +11 |
| 11 Sep 2014 | YouGov Online | ITV Wales | 31 | 16 | 21 | 5 | 17 | 7 | +10 |
| 01 Jul 2014 | YouGov Online | ITV Wales | 34 | 18 | 21 | 5 | 16 | 4 | +13 |
| 14 May 2014 | YouGov Online | ITV Wales | 35 | 17 | 19 | 7 | 14 | 6 | +16 |
| 22 Apr 2014 | YouGov Online | IPPR/Cardiff Uni/Edinburgh Uni | 37 | 19 | 21 | 7 | 10 | 4 | +16 |
| 12 Feb 2014 | YouGov Online | ITV Wales | 39 | 17 | 19 | 9 | 10 | 6 | +20 |
| 04 Dec 2013 | YouGov Online | ITV Wales | 40 | 15 | 19 | 9 | 10 | 7 | +21 |
| 22 Jul 2013 | YouGov Online | Elections in Wales Blog | 25 | 23 | 12 | 9 | 16 | 14 | +2 |
| 20 Feb 2013 | YouGov Online | ITV Wales | 26 | 26 | 14 | 8 | 13 | 6 | Tie |