Elections to the various legislatures in Bosnia and Herzegovina are carried out using open Party-list proportional representation. Constituencies are numbered and are known as electoral units.
House of Representatives of Bosnia and Herzegovina
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For elections to the House of Representatives of Bosnia and Herzegovina, each of the eight units is contained completely within one entity of Bosnia and Herzegovina. In the Federation of Bosnia and Herzegovina, two cantons make up a unit; whereas in Republika Srpska, units are based on municipalities.[2]
| Entity | # | Boundaries | Seats |
|---|---|---|---|
| Federation of Bosnia and Herzegovina | 1st | Una-Sana Canton and Canton 10 | 3 |
| 2nd | Herzegovina-Neretva Canton and West Herzegovina Canton | 3 | |
| 3rd | Sarajevo Canton and Bosnian-Podrinje Canton Goražde | 4 | |
| 4th | Zenica-Doboj Canton and Central Bosnia Canton | 6 | |
| 5th | Posavina Canton and Tuzla Canton | 5 | |
| Republika Srpska | 1st | The westmost stretch of Republika, extending far enough east to include the municipalities of Kotor Varoš, Čelinac, Prnjavor and Srbac | 3 |
| 2nd | The remainder of Republika, either side of the Brčko district | 3 | |
| 3rd | The southmost stretch of Republika, extending far enough north to include the municipality of Zvornik | 3 |
House of Representatives of the Federation of Bosnia and Herzegovina
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There are twelve units for elections to the subnational House of Representatives of the Federation of Bosnia and Herzegovina. Five are cantons at large, three are sections of more populous cantons, and four contain whole small cantons and sections of larger ones.[4]
| # | Canton/District | Boundaries | Seats |
|---|---|---|---|
| 1st | Una-Sana Canton | Whole Canton | 9 |
| 2nd | Posavina Canton | All of Brčko and Posavina, and the Tuzla Canton Municipalities of Gradačac, Doboj East and Gračanica |
5 |
| Brčko District | |||
| Tuzla Canton | |||
| 3rd | Tuzla, Lukavac, Srebrenik and Čelić | 7 | |
| 4th | Southern half | 4 | |
| 5th | Zenica-Doboj Canton | Zavidovići, Zenica and everything farther north | 8 |
| 6th | Southern half | 4 | |
| 8th | Central Bosnia Canton | Whole Canton | 9 |
| 9th | Herzegovina-Neretva Canton | Whole Canton | 8 |
| 10th | West Herzegovina Canton | Whole Canton | 3 |
| 7th | Bosnian-Podrinje Canton Goražde | BPK and the southern part of Sarajevo, including Novi Grad and Ilidža |
6 |
| Sarajevo Canton | |||
| 11th | The remainder of Sarajevo | 7 | |
| 12th | Canton 10 | Whole Canton | 3 |
National Assembly of Republika Srpska
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The nine units for the National Assembly of Republika Srpska are based on municipalities.[6] The current unit boundaries were drawn up for the 2014 election.
| # | Boundaries | Seats |
|---|---|---|
| 1st | The area bounded by the IEBL and the outer borders of the municipalities of Prijedor and Kozarska Dubica | 7 |
| 2nd | Municipalities of Gradiška, Laktaši, Srbac and Prnjavor | 7 |
| 3rd | The area bounded by the IEBL and the outer borders of the municipalities of Kotor Varoš, Čelinac and Banja Luka | 12 |
| 4th | Municipalities of Brod, Derventa, Vukosavlje and Modriča | 4 |
| 5th | Municipalities of Doboj, Stanari, Teslić and Petrovo | 6 |
| 6th | The area from the city of Bijeljina to Šamac, including the Brčko District | 9 |
| 7th | The municipalities of Osmaci, Zvornik, Šekovići, Vlasenica, Bratunac, Srebrenica and Milići | 7 |
| 8th | The area bounded by the IEBL and the outer borders of the municipalities of Rogatica and Han Pijesak | 4 |
| 9th | Everything south of the municipalities of Novo Goražde and Višegrad | 7 |
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Previously there were six constituencies. In 2014, three of the most populous units were split and the remaining units were renumbered:
| Old Units | New Units |
|---|---|
| 1st | 1st |
| 2nd | |
| 2nd | 3rd |
| 3rd | 4th |
| 5th | |
| 4th | 6th |
| 5th | 7th |
| 8th | |
| 6th | 9th |