Luxembourg (Chamber of Representatives constituency)

Luxembourg (Luxemburg) 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 as Arlon-Marche-Bastogne-Neufchâteau-Virton (Aarlen-Marche-Bastenaken-Neufchâteau-Virton) in 1995 following the fourth Belgian state reform. It was renamed Luxembourg in 2003 following the re-organisation of constituencies across Belgium along provincial lines. It is conterminous with the province of Luxembourg. The constituency currently elects four of the 150 members of the Chamber of Representatives using the open party-list proportional representation electoral system. At the 2019 federal election the constituency had 212,441 registered electors.

Electoral system
Luxembourg currently elects four 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. Since 2003 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.

Summary
(Figures in italics represent alliances.)

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

The following candidates were elected: Josy Arens (CDH), 17,308 votes; Mélissa Hanus (PS), 12,183 votes; Benoît Piedboeuf (MR), 14,052 votes; and Cécile Thibaut (Ecolo), 6,502 votes.

Substitutions:
 * Cécile Thibaut (Ecolo) resigned on 23 September 2021 and was substituted by Olivier Vajda (Ecolo) on the same day.

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

The following candidates were elected: Benoît Lutgen (CDH), 36,340 votes; Benoît Piedboeuf (MR), 15,351 votes; Sébastian Pirlot (PS), 13,815 votes; and Isabelle Poncelet (CDH), 12,954 votes.

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

The following candidates were elected: Philippe Collard (MR), 12,124 votes; Philippe Courard (PS), 22,899 votes; Benoît Lutgen (CDH), 33,038 votes; and Isabelle Poncelet (CDH), 11,466 votes.

Substitutions:
 * Isabelle Poncelet (CDH) resigned on 14 June 2010 and was substituted by Josy Arens (CDH) on 6 July 2010.
 * Philippe Courard (PS) was appointed to the federal government and was substituted by André Perpète (PS) on 7 December 2011.

2007
Results of the 2007 federal election held on 10 June 2007:

The following candidates were elected: Josy Arens (CDH), 23,511 votes; Philippe Collard (MR), 20,558 votes; Carine Lecomte (MR), 7,877 votes; and André Perpète (PS), 10,452 votes.

2003
Results of the 2003 federal election held on 18 May 2003:

The following candidates were elected: Josy Arens (CDH), 20,369 votes; Philippe Collard (MR), 17,847 votes; André Perpète (PS), 13,967 votes; and Dominique Tilmans (MR), 10,772.

1999
Results of the 1999 federal election held on 13 June 1999:

The following candidates were elected: Antoine Duquesne (PRL-FDF), 15,601 votes; Guy Larcier (PS), 11,508 votes; and Jean-Pol Poncelet (PSC), 25,522 votes.

Substitutions:
 * Antoine Duquesne (PRL-FDF) was appointed to the federal government and was substituted by Philippe Collard (PRL-FDF) on 14 July 1999.

1995
Results of the 1995 federal election held on 21 May 1995:

The following candidates were elected: Antoine Duquesne (PRL-FDF), 17,515 votes; Guy Larcier (PS), 14,407 votes; and Jean-Pol Poncelet (PSC), 21,208 votes.

Substitutions:
 * Jean-Pol Poncelet (PSC) was appointed to the federal government and was substituted by Josy Arens (PSC) on 3 October 1995.