Hainaut (; ) is one of the 11 multi-member constituencies of the Chamber of Representatives, the lower house of the Belgian Federal Parliament, the national legislature of Belgium. The constituency was established in 2003 following the re-organisation of constituencies across Belgium along provincial lines. It is conterminous with the province of Hainaut. The constituency currently elects 17 of the 150 members of the Chamber of Representatives using the open party-list proportional representation electoral system. At the 2024 federal election the constituency had 963,104 registered electors.

Electoral system Hainaut currently elects 17 of the 150 members of the Chamber of Representatives using the open party-list proportional representation electoral system. Seats are allocated using the D'Hondt method. Only parties that reach the 5% threshold in the constituency compete for seats.

Electors may vote for the list (party) or for individual candidates, either main candidates or substitute candidates or a combination, on the list. They may vote for as many candidates as there are seats in the constituency. Split-ticket voting (panachage) is not permitted and will result in the ballot paper being invalidated. The minimum number of votes a candidate must obtain to get elected - the quotient - is calculated as the total votes received by the party divided by the number of seats in the constituency plus one. Half the ballot papers where there are no votes for main candidates (i.e. the elector has voted for the list or for substitute candidates only) are redistributed amongst main candidates in the order they appear on the ballot paper so that the candidate's total votes (personal votes plus redistributed votes) equals the quotient. The seats won by the party are then allocated to the candidates with the most number of total votes.

Election results Summary Election WorkersPTB EcoloEcolo SocialistsPS Democratic FederalistsDéFI / FDF ReformistsMR Les EngagésLE / CDH Chez NousChez Nous / PP National FrontFN colspan=3 colspan=3 colspan=3 colspan=3 colspan=3 colspan=3 colspan=3 colspan=3 Votes % Seats Votes % Seats Votes % Seats Votes % Seats Votes % Seats Votes % Seats Votes % Seats Votes % Seats2024 103,339 13.97% 3 36,750 4.97% 0 213,501 28.86% 6 15,189 2.05% 0 192,759 26.05% 5 114,559 15.48% 3 22,039 2.98% 0 2019 114,243 15.64% 3 89,898 12.30% 3 250,146 34.24% 8 27,484 3.76% 0 116,528 15.95% 3 58,695 8.03% 1 24,719 3.38% 0 2014 38,194 5.17% 1 43,488 5.89% 1 303,085 41.04% 9 14,382 1.95% 0 153,301 20.76% 5 76,812 10.40% 2 32,158 4.35% 0 2010 12,136 1.68% 0 67,993 9.41% 2 348,184 48.18% 11 126,608 17.52% 4 82,924 11.47% 2 19,852 2.75% 0 20,129 2.79% 02007 6,376 0.86% 0 78,777 10.61% 2 254,070 34.23% 7 199,859 26.93% 6 104,565 14.09% 3 58,408 7.87% 12003 5,606 0.77% 0 46,400 6.39% 1 320,144 44.07% 10 159,487 21.96% 5 87,975 12.11% 2 52,332 7.20% 1 (Figures in italics represent alliances.)

Detailed 2024 Results of the 2024 federal election held on 9 June 2024:

Party Votes per arrondissement Totalvotes % SeatsAth Charle-roi La Lou-vière Mons Mous-cron Soig-nies Thuin Tournai Expat-riates Socialist Party PS 18,413 67,685 23,287 43,669 7,644 15,339 12,497 22,496 2,471 213,501 28.86% 6 Reformist Movement MR 22,864 46,440 17,081 37,205 8,311 18,134 18,245 21,747 2,732 192,759 26.05% 5 Les Engagés LE 15,544 24,722 10,471 17,777 6,226 10,702 11,704 16,180 1,233 114,559 15.48% 3 Workers' Party of Belgium PTB 9,039 32,818 13,240 19,493 4,872 8,046 5,877 9,131 823 103,339 13.97% 3 Ecolo Ecolo 4,649 7,124 2,525 6,273 3,065 3,731 2,232 5,426 1,725 36,750 4.97% 0 Chez Nous Chez Nous 2,088 6,755 2,118 3,519 1,518 1,692 1,623 2,247 479 22,039 2.98% 0 DéFI DéFI 2,061 4,415 1,468 2,638 467 1,434 1,108 1,356 242 15,189 2.05% 0 New Flemish Alliance N-VA 2,082 3,772 1,370 2,116 908 1,106 943 1,587 300 14,184 1.92% 0 Blank Party PB 1,694 3,714 1,129 2,397 531 1,196 977 1,424 162 13,224 1.79% 0 Citizen Collective CC 729 2,292 650 1,040 300 661 633 624 272 7,201 0.97% 0 Workers' Struggle LO 408 1,386 559 770 332 326 297 442 160 4,680 0.63% 0 Belgische Unie – Union Belge BUB 350 693 251 388 141 160 125 213 105 2,426 0.33% 0Valid votes 79,921 201,816 74,149 137,285 34,315 62,527 56,261 82,873 10,704 739,851 100.00% 17Rejected votes 7,178 23,483 8,490 15,834 4,992 5,169 5,135 8,636 801 79,718 9.73% Total polled 87,099 225,299 82,639 153,119 39,307 67,696 61,396 91,509 11,505 819,569 85.10% Registered electors 98,482 268,470 96,008 180,947 44,288 77,152 70,998 105,070 21,689 963,104 Turnout 88.44% 83.92% 86.08% 84.62% 88.75% 87.74% 86.48% 87.09% 53.05% 85.10%

The following candidates were elected: Hugues Bayet (PS), 9,016 votes; Georges-Louis Bouchez (MR), 79,447 votes; Hervé Cornillie (MR), 8,246 votes; Jean-Luc Crucke (LE), 32,308 votes; Roberto d'Amico (PTB), 6,078 votes; Ludivine Dedonder (PS), 29,525 votes; Denis Ducarme (MR), 19,205 votes; Anthony Dufrane (MR), 12,475 votes; Jean-François Gatelier (LE), 6,317 votes; Paul Magnette (PS), 90,198 votes; Sofie Merckx (PTB), 18,587 votes; Marie Meunier (PS), 9,478 votes; Patrick Prévot (PS), 9,798 votes; Julie Taton (MR), 23,633 votes; Éric Thiébaut (PS), 12,990 votes; Aurore Tourneur (LE), 11,015 votes; and Ayşe Yiğit (PTB), 5,531 votes.

Substitutions: Jean-Luc Crucke (LE) was appointed to the federal government and was substituted by Julien Matagne (LE) on 4 February 2025.

2019 Results of the 2019 federal election held on 26 May 2019:

Party Votes per arrondissement Totalvotes % SeatsAth Charle-roi La Lou-vière Mons Mous-cron Soig-nies Thuin Tournai Expat-riates Socialist Party PS 23,290 71,003 29,734 57,188 8,318 18,589 15,468 26,302 254 250,146 34.24% 8 Reformist Movement MR 16,186 26,305 8,455 20,383 5,059 11,639 11,736 16,531 234 116,528 15.95% 3 Workers' Party of Belgium PTB 9,203 38,395 15,160 22,442 3,642 8,665 7,076 9,598 62 114,243 15.64% 3 Ecolo Ecolo 10,642 19,767 6,456 18,407 6,488 8,391 6,398 12,969 380 89,898 12.30% 3 Humanist Democratic Centre CDH 6,543 11,792 4,429 10,651 6,200 4,322 7,783 6,885 90 58,695 8.03% 1 DéFI DéFI 3,923 9,631 2,273 4,006 584 2,382 1,885 2,769 31 27,484 3.76% 0 People's Party PP 2,346 9,081 2,180 4,448 992 1,650 1,982 2,003 37 24,719 3.38% 0 Vlaams Belang VB 1,408 2,078 756 1,446 644 564 468 876 6 8,246 1.13% 0 Destexhe List 826 2,634 745 1,538 218 1,063 618 530 5 8,177 1.12% 0 Citizen Collective CC 1,641 1,860 679 1,493 729 518 436 630 6 7,992 1.09% 0 Agir 421 2,240 485 1,221 245 429 430 421 24 5,916 0.81% 0 The Right 379 2,169 579 1,249 278 410 366 480 6 5,916 0.81% 0 Workers' Struggle LO 528 1,634 791 1,187 333 406 366 486 4 5,735 0.78% 0 Nation 480 1,590 487 725 434 346 287 984 8 5,341 0.73% 0 Communist Party of Belgium PCB 109 702 196 274 58 93 91 98 5 1,626 0.22% 0Valid votes 77,925 200,881 73,405 146,658 34,222 59,467 55,390 81,562 1,152 730,662 100.00% 18Rejected votes 7,256 23,612 8,144 15,690 5,131 5,716 5,410 9,178 97 80,234 9.89% Total polled 85,181 224,493 81,549 162,348 39,353 65,183 60,800 90,740 1,249 810,896 86.01% Registered electors 96,112 265,624 94,020 192,359 44,507 74,113 69,701 104,602 1,751 942,789 Turnout 88.63% 84.52% 86.74% 84.40% 88.42% 87.95% 87.23% 86.75% 71.33% 86.01%

The following candidates were elected: Hugues Bayet (PS), 14,387 votes; Roberto d'Amico (PTB), 4,552 votes; Ludivine Dedonder (PS), 16,663 votes; Elio Di Rupo (PS), 125,009 votes; Denis Ducarme (MR), 24,959 votes; Catherine Fonck (CDH), 19,333 votes; Marie-Colline Leroy (Ecolo), 8,410 votes; Marie-Christine Marghem (MR), 14,079 votes; Sofie Merckx (PTB), 8,912 votes; Jean-Marc Nollet (Ecolo), 16,676 votes; Özlem Özen (PS), 10,791 votes; Patrick Prévot (PS), 13,615 votes; Daniel Senesael (PS), 11,843 votes; Caroline Taquin (MR), 13,119 votes; Éric Thiébaut (PS), 14,791 votes; Marco Van Hees (PTB), 16,271 votes; Albert Vicaire (Ecolo), 2,818 votes; and Laurence Zanchetta (PS), 7,038 votes.

Substitutions: Jean-Marc Nollet (Ecolo) resigned on 18 September 2019 and was substituted by Laurence Hennuy (Ecolo) on 3 October 2019. Elio Di Rupo (PS) resigned on 19 September 2019 after he was appointed Minister-President of Wallonia and was substituted by Philippe Tison (PS). Ludivine Dedonder (PS) was appointed to the federal government and was substituted by Leslie Leoni (PS) on 1 October 2020. Marie-Colline Leroy (Ecolo) was appointed to the federal government and was substituted by Louis Mariage (Ecolo) on 11 May 2023.

2014 Results of the 2014 federal election held on 25 May 2014:

Party Votes per arrondissement Totalvotes % SeatsAth Charle-roi Mons Mous-cron Soig-nies Thuin Tournai Expat-riates Socialist Party PS 22,060 91,258 67,292 11,871 41,047 36,544 32,565 448 303,085 41.04% 9 Reformist Movement MR 14,341 40,413 25,452 6,816 23,430 20,337 22,257 255 153,301 20.76% 5 Humanist Democratic Centre CDH 5,398 18,210 13,957 8,300 11,178 10,254 9,423 92 76,812 10.40% 2 Ecolo Ecolo 3,387 11,389 7,929 2,957 6,776 4,516 6,405 129 43,488 5.89% 1 Workers' Party of Belgium PTB 1,455 16,031 7,377 811 5,984 4,075 2,443 18 38,194 5.17% 1 People's Party PP 1,945 13,753 5,549 754 4,054 4,279 1,795 29 32,158 4.35% 0 Debout Les Belges! 960 10,225 6,444 582 2,677 2,205 1,513 28 24,634 3.34% 0 Make Way Clear 573 5,729 3,410 649 2,164 1,799 1,132 11 15,467 2.09% 0 Francophone Democratic Federalists FDF 947 5,101 2,755 417 2,290 1,659 1,198 15 14,382 1.95% 0 The Right 382 2,265 1,265 427 822 920 704 19 6,804 0.92% 0 Pirate 406 1,376 1,085 352 1,123 513 1,044 8 5,907 0.80% 0 Wallonia First 279 1,928 902 256 613 507 428 13 4,926 0.67% 0 Nation 157 1,192 560 251 520 294 789 4 3,767 0.51% 0 Workers' Struggle LO 186 1,129 734 204 577 388 320 1 3,539 0.48% 0 Anti-Sharia Party P+ 73 947 718 34 186 195 97 4 2,254 0.31% 0 Rassemblement Wallonie France RWF 113 729 410 46 295 304 158 3 2,058 0.28% 0 New Alternative Wallonia NWA 77 681 298 66 154 277 117 3 1,673 0.23% 0 Left Movement MG 155 568 241 63 178 196 257 4 1,662 0.23% 0 Walloon Front FW 62 920 202 69 142 150 85 3 1,633 0.22% 0 Walloon Rally RW 139 561 330 59 133 221 143 12 1,598 0.22% 0 Belgische Unie – Union Belge BUB 36 199 147 37 134 67 64 4 688 0.09% 0 General Movement of YoungDisadvantaged Workers MGJOD 30 192 82 21 48 45 42 0 460 0.06% 0Valid votes 53,161 224,796 147,139 35,042 104,525 89,745 82,979 1,103 738,490 100.00% 18Rejected votes 4,468 22,852 14,432 5,062 9,354 8,258 8,695 101 73,222 9.02% Total polled 57,629 247,648 161,571 40,104 113,879 98,003 91,674 1,204 811,712 87.59% Registered electors 64,208 286,339 186,435 44,866 128,479 110,451 104,404 1,550 926,732 Turnout 89.75% 86.49% 86.66% 89.39% 88.64% 88.73% 87.81% 77.68% 87.59%

The following candidates were elected: Philippe Blanchart (PS), 8,860 votes; Christian Brotcorne (CDH), 8,700 votes; Olivier Chastel (MR), 41,921 votes; Paul-Olivier Delannois (PS), 8,271 votes; Laurent Devin (PS), 12,889 votes; Elio Di Rupo (PS), 181,964 votes; Denis Ducarme (MR), 15,142 votes; Jean-Jacques Flahaux (MR), 8,061 votes; Catherine Fonck (CDH), 24,645 votes; Benoît Friart (MR), 8,597 votes; Marie-Christine Marghem (MR), 21,088 votes; Éric Massin (PS), 12,935 votes; Jean-Marc Nollet (Ecolo), 7,936 votes; Özlem Özen (PS), 11,961 votes; Daniel Senesael (PS), 16,113 votes; Éric Thiébaut (PS), 12,935 votes; Marco Van Hees (PTB), 5,488 votes; and Fabienne Winckel (PS), 8,899 votes.

Substitutions: Marie-Christine Marghem (MR) was appointed to the federal government and was substituted by Richard Miller (MR) on 14 October 2014.

2010 Results of the 2010 federal election held on 13 June 2010: