Partai Gerindra menjadi pemenang pemilu 2019 di Riau dengan memperoleh 13,35% suara, disusul PDIP dengan 12,85% suara, dan tempat ketiga PKS dengan 12,67% suara.
| WILAYAH | PKB | Gerindra | PDIP | Golkar | NasDem | Garuda | Berkarya | PKS | Perindo | PPP | PSI | PAN | Hanura | Demokrat | PBB | PKPI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BENGKALIS (100%) | 12.906 | 25.130 | 41.212 | 20.326 | 14.825 | 863 | 5.990 | 59.154 | 8.674 | 28.982 | 4.653 | 30.918 | 9.147 | 17.327 | 3.496 | 628 |
| INDRAGIRI HILIR (100%) | 55.358 | 39.144 | 22.973 | 55.409 | 18.092 | 2.335 | 8.428 | 14.934 | 4.748 | 35.020 | 1.746 | 21.999 | 1.269 | 17.007 | 5.520 | 774 |
| INDRAGIRI HULU (100%) | 18.984 | 23.736 | 24.468 | 29.723 | 35.342 | 1.757 | 5.990 | 14.881 | 8.676 | 12.384 | 2.070 | 8.024 | 2.265 | 12.050 | 1.515 | 1.037 |
| KAMPAR (100%) | 13.555 | 67.768 | 38.564 | 36.289 | 16.765 | 1.633 | 7.663 | 69.770 | 6.695 | 14.542 | 3.828 | 26.613 | 2.293 | 58.072 | 4.568 | 932 |
| KEPULAUAN MERANTI (100%) | 9.478 | 8.407 | 11.010 | 9.749 | 2.846 | 819 | 2.304 | 6.417 | 2.449 | 13.655 | 888 | 16.692 | 1.353 | 5.470 | 894 | 191 |
| KOTA DUMAI (100%) | 4.382 | 20.897 | 24.262 | 8.087 | 7.603 | 1.254 | 2.382 | 23.872 | 2.391 | 6.060 | 1.923 | 17.806 | 5.678 | 13.664 | 1.741 | 268 |
| KOTA PEKANBARU (100%) | 9.830 | 71.664 | 46.173 | 28.356 | 10.697 | 1.463 | 6.515 | 92.058 | 5.748 | 10.742 | 11.683 | 62.992 | 13.985 | 60.010 | 3.907 | 572 |
| KUANTAN SINGINGI(100%) | 17.185 | 21.043 | 14.542 | 44.846 | 7.587 | 1.136 | 3.802 | 12.103 | 3.986 | 9.222 | 1.253 | 15.802 | 2.163 | 9.631 | 1.263 | 496 |
| PELALAWAN (100%) | 16.781 | 20.336 | 26.014 | 48.790 | 4.152 | 620 | 4.055 | 13.896 | 3.668 | 5.509 | 1.940 | 10.055 | 1.500 | 13.831 | 619 | 232 |
| ROKAN HILIR (100%) | 13.195 | 30.224 | 61.875 | 31.400 | 26.418 | 1.361 | 15.077 | 20.545 | 18.764 | 18.962 | 2.122 | 11.586 | 10.447 | 16.175 | 2.024 | 538 |
| ROKAN HULU (100%) | 9.445 | 38.908 | 30.857 | 19.291 | 8.699 | 990 | 3.742 | 15.568 | 5.963 | 6.153 | 1.658 | 18.255 | 7.332 | 72.363 | 1.603 | 291 |
| SIAK (100%) | 13.018 | 19.773 | 30.577 | 15.716 | 7.565 | 713 | 4.999 | 24.168 | 4.897 | 5.891 | 3.731 | 39.218 | 8.828 | 25.418 | 1.792 | 326 |