PDI Perjuangan menjadi pemenang pemilu 2019 di Provinsi Sulawesi Barat dengan memperoleh 30,64% suara, disusul Partai Gerindra dengan 13,88% suara, dan tempat ketiga Partai Nasdem dengan 13,41% suara.
| WILAYAH | PKB | Gerindra | PDIP | Golkar | NasDem | Garuda | Berkarya | PKS | Perindo | PPP | PSI | PAN | Hanura | Demokrat | PBB | PKPI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MAJENE (100%) | 6.354 | 17.895 | 22.609 | 9.088 | 9.255 | 766 | 1.159 | 1.289 | 451 | 4.270 | 659 | 5.170 | 644 | 11.349 | 678 | 172 |
| MAMASA (100%) | 10.795 | 8.221 | 30.496 | 4.928 | 12.338 | 716 | 878 | 619 | 1.869 | 1.176 | 896 | 791 | 13.848 | 5.534 | 223 | 271 |
| MAMUJU (100%) | 3.904 | 14.456 | 26.888 | 5.785 | 25.171 | 2.221 | 1.835 | 1.628 | 1.754 | 885 | 590 | 4.083 | 5.086 | 39.683 | 764 | 281 |
| MAMUJU TENGAH (100%) | 2.294 | 4.126 | 26.535 | 6.261 | 3.639 | 932 | 863 | 1.611 | 1.632 | 707 | 274 | 2.179 | 1.787 | 10.087 | 361 | 219 |
| PASANGKAYU (100%) | 2.210 | 7.899 | 42.334 | 5.059 | 5.042 | 436 | 934 | 1.238 | 2.355 | 1.003 | 559 | 2.898 | 1.975 | 4.336 | 313 | 173 |
| POLEWALI MANDAR (100%) | 17.896 | 43.646 | 63.684 | 20.777 | 37.562 | 1.359 | 4.496 | 3.856 | 2.696 | 3.777 | 1.167 | 13.423 | 2.625 | 11.311 | 2.201 | 475 |
Sumber: kpu.go.id