This table provides a list of scientific, public opinion polls that were conducted from the 2014 Quebec general election leading up to the 2018 Quebec general election, which took place as scheduled on October 1, 2018.
| width=18% | Polling firm | width=18% | Last date of polling | Link | QLP | PQ | CAQ | QS | Other | Lead | Sample Size | Margin of Error | Method |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018 election | HTML | 24.8 | 17.1 | 37.4 | 16.1 | 4.6 | 12.6 | ||||||
| Forum | September 30, 2018 | 28 | 20 | 33 | 17 | 2 | 5 | IVR | |||||
| Research Co. | HTML | 30 | 18 | 33 | 16 | 3 | 3 | 625 | 3.9% | Online | |||
| Angus Reid Institute | 25 | 18 | 32 | 20 | 5 | 7 | 635 | 4% | Online | ||||
| Ipsos | 31 | 18 | 32 | 16 | 3 | 1 | 1250 | 3.2% | Online/telephone | ||||
| Mainstreet | HTML | 29.0 | 19.5 | 31.5 | 16.3 | 3.6 | 2.5 | 1760 | 2.3% | IVR | |||
| Leger | 30 | 19 | 32 | 17 | 2 | 2 | 1502 | 2.7% | Online | ||||
| Ipsos | 30 | 20 | 30 | 16 | 4 | 0 | 1250 | 3.2% | Online/telephone | ||||
| Research Co. | HTML | 30 | 19 | 32 | 16 | 3 | 2 | 601 | 4.0 | Online | |||
| Third televised debate (in French, September 20, 2018) | |||||||||||||
| Second televised debate (in English, September 17, 2018) | |||||||||||||
| Leger | 30 | 21 | 31 | 14 | 4 | 1 | 3017 | 1.78% | Online | ||||
| CROP | 37 | 16 | 30 | 14 | 3 | 7 | 1000 | Online | |||||
| Forum | 22 | 24 | 32 | 19 | 2 | 8 | 1274 | 3% | IVR | ||||
| Mainstreet | HTML | 28.6 | 21.5 | 29.1 | 17.1 | 3.6 | 0.5 | 1665 | 2.4% | IVR | |||
| First televised debate (in French, September 13, 2018) | |||||||||||||
| Leger | 29 | 21 | 35 | 11 | 4 | 6 | 1014 | 3.1% | Online | ||||
| Mainstreet | HTML | 27.2 | 21.1 | 32.2 | 15.7 | 3.8 | 5.0 | 2531 | 1.9% | IVR | |||
| Leger | 32 | 19 | 37 | 8 | 4 | 5 | 1010 | 3.1% | Online | ||||
| Election period officially begins (August 24, 2018) | |||||||||||||
| Forum | 22 | 21 | 42 | 13 | 2 | 20 | 965 | 3% | IVR | ||||
| Ipsos | 29 | 18 | 36 | 11 | 6 | 7 | 1501 | 2.9% | Online/Telephone | ||||
| Mainstreet | 25.6 | 17.7 | 32.1 | 13.9 | 10.7 | 6.5 | 1647 | 2.4% | IVR | ||||
| CROP | 36 | 15 | 38 | 10 | 2 | 2 | 1000 | 3.1% | Online | ||||
| Leger | 30 | 18 | 36 | 10 | 6 | 6 | 2488 | 2.0% | Online | ||||
| Mainstreet | HTML | 29.7 | 16.5 | 32.3 | 11.7 | 9.8 | 2.6 | 1320 | 2.7% | IVR | |||
| CROP | 33 | 14 | 39 | 11 | 3 | 6 | 1002 | 3.1% | Online | ||||
| Leger | 28 | 19 | 37 | 9 | 7 | 9 | 3234 | 1.7% | Online | ||||
| Leger | 26 | 22 | 35 | 10 | 6 | 9 | 1018 | 3.1% | Online | ||||
| Ipsos | HTML | 32 | 20 | 35 | 8 | 5 | 3 | 2001 | 2.5% | Online | |||
| CROP | 35 | 16 | 35 | 12 | 2 | 0 | 1005 | Online | |||||
| Mainstreet | HTML | 29.7 | 16.2 | 30.1 | 12.0 | 12.0 | 0.4 | 1200 | 2.8% | IVR | |||
| Leger | 29 | 21 | 34 | 9 | 7 | 5 | 1019 | 3.1% | Online | ||||
| CROP | 35 | 14 | 37 | 12 | 2 | 2 | 1026 | Online | |||||
| Mainstreet | HTML | 27.8 | 19.8 | 32.0 | 10.8 | 9.6 | 4.2 | 1062 | 3.1% | IVR | |||
| Leger | 26 | 22 | 37 | 9 | 7 | 11 | 993 | 3.1% | Online | ||||
| Ipsos | HTML | 30 | 23 | 34 | 8 | 6 | 4 | 1297 | 4.4% | Online/telephone | |||
| Leger | 28 | 20 | 39 | 9 | 4 | 11 | 983 | 3.1% | Online | ||||
| CROP | 36 | 18 | 34 | 9 | 3 | 2 | 1000 | Online | |||||
| Mainstreet | HTML | 31.4 | 18.1 | 31.6 | 14.9 | 4.0 | 0.2 | 965 | 3.1% | IVR | |||
| CROP | 36 | 14 | 38 | 10 | 2 | 2 | 1000 | Online | |||||
| Mainstreet | 29 | 24 | 31 | 15 | 2 | 2 | 1500 | 2.5% | Telephone | ||||
| Leger | 32 | 19 | 36 | 11 | 2 | 4 | 1010 | 3.1% | Online | ||||
| CROP | HTML | 35 | 17 | 35 | 10 | 2 | 0 | 1000 | Online | ||||
| Mainstreet | 29 | 24 | 29 | 16 | 2 | 0 | 1500 | 2.5% | Telephone | ||||
| Leger | 29 | 20 | 34 | 12 | 5 | 5 | 1008 | 3.1% | Online | ||||
| CROP | HTML | 42 | 13 | 31 | 11 | 2 | 11 | 1000 | 3% | Online | |||
| Ipsos | HTML | 32 | 24 | 28 | 12 | 4 | 4 | 1659 | 3.3% | Online/Telephone | |||
| Mainstreet | 29 | 26 | 26 | 16 | 2 | 3 | 1500 | 2.5% | Telephone | ||||
| CROP | 33 | 22 | 29 | 13 | 2 | 4 | 1002 | Online | |||||
| Mainstreet | HTML | 30 | 26 | 26 | 18 | 0* | 4 | 1501 | 2.5% | Telephone | |||
| Leger | 32 | 22 | 28 | 12 | 6 | 4 | 1003 | 3.1% | Online | ||||
| Mainstreet | HTML | 31 | 24 | 28 | 17 | 0* | 3 | 1501 | 2.5% | Telephone | |||
| Mainstreet | HTML | 33 | 21 | 28 | 19 | 0* | 5 | ||||||
| CROP | 38 | 21 | 25 | 13 | 3 | 13 | |||||||
| Leger | 31 | 22 | 28 | 15 | 4 | 3 | |||||||
| Mainstreet | HTML | 33 | 22 | 27 | 18 | 0* | 6 | ||||||
| Leger | 30 | 22 | 28 | 13 | 7 | 2 | |||||||
| CROP | HTML | 36 | 24 | 28 | 10 | 2 | 8 | ||||||
| Leger | 32 | 23 | 26 | 13 | 6 | 6 | |||||||
| Mainstreet | HTML | 31 | 24 | 32 | 14 | 0* | 1 | ||||||
| CROP | HTML | 37 | 24 | 26 | 9 | 4 | 11 | ||||||
| Mainstreet | HTML | 33 | 27 | 26 | 14 | 0* | 6 | ||||||
| Mainstreet | HTML | 39 | 26 | 23 | 12 | 0* | 13 | ||||||
| Leger | 34 | 25 | 22 | 14 | 5 | 9 | |||||||
| Mainstreet | HTML | 34 | 31 | 27 | 8 | 0* | 3 | ||||||
| Mainstreet | HTML | 34 | 31 | 28 | 7 | 0* | 3 | ||||||
| Leger | 32 | 29 | 23 | 9 | 7 | 3 | |||||||
| Mainstreet | HTML | 35 | 32 | 26 | 7 | 0* | 3 | ||||||
| CROP | 35 | 27 | 25 | 11 | 2 | 8 | |||||||
| Leger | 30 | 30 | 26 | 10 | 4 | 0 | |||||||
| CROP | 38 | 25 | 23 | 9 | 5 | 13 | |||||||
| CROP | 36 | 24 | 26 | 11 | 3 | 10 | |||||||
| Leger | 31 | 30 | 25 | 10 | 4 | 1 | |||||||
| CROP | 37 | 30 | 22 | 9 | 2 | 7 | |||||||
| Leger | 35 | 29 | 23 | 10 | 4 | 6 | |||||||
| CROP | 37 | 27 | 26 | 9 | 1 | 10 | |||||||
| Leger | 34 | 29 | 23 | 10 | 4 | 5 | |||||||
| CROP | HTML | 35 | 25 | 25 | 12 | 4 | 10 | ||||||
| CROP | HTML | 34 | 25 | 24 | 14 | 3 | 9 | ||||||
| Leger | 32 | 30 | 24 | 10 | 4 | 2 | |||||||
| CROP | 34 | 26 | 27 | 11 | 3 | 7 | |||||||
| Leger | 35 | 30 | 21 | 10 | 4 | 5 | |||||||
| CROP | HTML | 33 | 26 | 25 | 14 | 3 | 7 | ||||||
| Leger | 33 | 30 | 22 | 10 | 6 | 3 | |||||||
| CROP | HTML | 32 | 30 | 24 | 11 | 3 | 2 | ||||||
| CROP | 36 | 31 | 18 | 12 | 3 | 5 | |||||||
| Leger | 36 | 29 | 21 | 10 | 5 | 7 | |||||||
| CROP | 35 | 27 | 19 | 16 | 3 | 8 | |||||||
| CROP | 37 | 30 | 17 | 13 | 3 | 7 | |||||||
| Leger | 35 | 32 | 20 | 10 | 2 | 3 | |||||||
| CROP | 36 | 35 | 16 | 12 | 2 | 1 | |||||||
| CROP | 36 | 33 | 16 | 12 | 3 | 3 | |||||||
| CROP | 37 | 30 | 18 | 13 | 2 | 7 | |||||||
| CROP | 33 | 29 | 23 | 13 | 2 | 4 | |||||||
| CROP | HTML | 34 | 34 | 17 | 13 | 2 | 0 | ||||||
| Leger | 36 | 32 | 20 | 10 | 2 | 4 | |||||||
| CROP | HTML | 29 | 33 | 20 | 15 | 3 | 4 | ||||||
| Leger | 32 | 34 | 20 | 10 | 3 | 2 | |||||||
| CROP | 34 | 27 | 25 | 12 | 2 | 7 | |||||||
| Leger | 37 | 28 | 21 | 10 | 4 | 9 | |||||||
| CROP | HTML | 29 | 27 | 26 | 16 | 2 | 2 | ||||||
| CROP | HTML | 37 | 26 | 22 | 11 | 3 | 11 | ||||||
| Leger | 37 | 25 | 25 | 9 | 4 | 12 | |||||||
| CROP | 35 | 26 | 23 | 13 | 4 | 9 | |||||||
| CROP | HTML | 35 | 28 | 27 | 10 | 1 | 7 | ||||||
| Leger | 34 | 26 | 26 | 11 | 3 | 8 | |||||||
| CROP | HTML | 36 | 23 | 24 | 14 | 3 | 12 | ||||||
| Leger | 36 | 26 | 26 | 10 | 2 | 10 | |||||||
| CROP | 40 | 25 | 23 | 12 | 0 | 15 | |||||||
| Leger | 38 | 21 | 28 | 10 | 3 | 10 | |||||||
| CROP | 35 | 21 | 30 | 13 | 1 | 5 | |||||||
| Leger | 41 | 22 | 23 | 10 | 4 | 18 | |||||||
| CROP | 41 | 18 | 27 | 12 | 2 | 14 | |||||||
| Leger | 40 | 20 | 27 | 9 | 4 | 13 | |||||||
| CROP | 39 | 19 | 29 | 10 | 3 | 10 | |||||||
| Leger | 39 | 20 | 29 | 9 | 3 | 10 | |||||||
| CROP | 41 | 22 | 24 | 10 | 3 | 17 | |||||||
| Leger | 40 | 19 | 27 | 11 | 3 | 13 | |||||||
| CROP | 40 | 22 | 23 | 11 | 3 | 17 | |||||||
| 2014 election | HTML | 41.52 | 25.38 | 23.05 | 7.63 | 2.42 | 16.14 | ||||||
"*" = Mainstreet does not mention "Other" nor any other party than the main four, but the total of the main four is 100%, (±1% because of sum of rounding errors). It is not known whether any other parties were allowed in the answer, or whether those answers were excluded, but it is highly unlikely that less than 0.5% of those polled by Mainstreet prefer a party other than the main four. |}