| Table of contents |
| Country | Body | Voting system | Total seats |
|---|---|---|---|
| Antigua and Barbuda | First past the post | 17 | |
| Aruba | First past the post | 21 | |
| Australia | House of Representatives | Instant-runoff voting | 150 |
| Bahamas | First past the post | 49 | |
| Bangladesh | First past the post | 300 | |
| Barbados | First past the post | 28 | |
| Belarus | Runoff | 260 | |
| Belize | First past the post | 29 | |
| Bhutan | First past the post | 150 | |
| Botswana | First past the post | 47 | |
| Canada | House of Commons | First past the post | 308 |
| Cayman Islands | First past the post | 19 | |
| Central African Republic | Runoff | 85 | |
| Congo | Runoff | 125 | |
| Cuba | Runoff | 589 | |
| Czech Republic | Senát | Runoff | 81 |
| Democratic Republic of Congo | First past the post | 210 | |
| Dominica | First past the post | 31 | |
| Egypt | Runoff | 444 | |
| Ethiopia | First past the post | 547 | |
| Fiji | Instant-runoff voting | 70 | |
| France | Runoff | 577 | |
| Gabon | Runoff | 120 | |
| Gambia | First past the post | 36 | |
| Ghana | First past the post | 200 | |
| Grenada | First past the post | 15 | |
| Guadeloupe | General Council | Runoff | 42 |
| Regional Council | Runoff | 41 | |
| Haiti | Runoff | 83 | |
| India | First past the post | 543 | |
| Iran | Runoff | 270 | |
| Jamaica | First past the post | 60 | |
| Kazakhstan | Runoff | 67 | |
| Kenya | First past the post | 188 | |
| Kiribati | Runoff | 39 | |
| Kyrgyzstan | Runoff | 35 | |
| Malawi | First past the post | 177 | |
| Malaysia | First past the post | 192 | |
| Mali | Runoff | 147 | |
| Marshall Islands | First past the post | 33 | |
| Mauritania | Runoff | 79 | |
| Monaco | Runoff | 18 | |
| Mongolia | First past the post | 76 | |
| Montserrat | First past the post | 7 | |
| Morocco | First past the post | 222 | |
| Nauru | Instant-runoff voting | 18 | |
| Nepal | First past the post | 205 | |
| Nigeria | First past the post | 593 | |
| North Korea | First past the post | 687 | |
| Pakistan | First past the post | 217 | |
| Palau | First past the post | 30 | |
| Papua New Guinea | First past the post | 109 | |
| Rwanda | First past the post | 70 | |
| Saint Kitts and Nevis | First past the post | 11 | |
| Saint Lucia | First past the post | 17 | |
| Saint Vincent and the Grenadines | First past the post | 15 | |
| Sierra Leone | First past the post | 68 | |
| Solomon Islands | First past the post | 47 | |
| Sudan | First past the post | 275 | |
| Swaziland | First past the post | 55 | |
| Syria | First past the post | 250 | |
| Tajikistan | Runoff | 181 | |
| Tanzania | First past the post | 232 | |
| Togo | Runoff | 81 | |
| Tonga | First past the post | 9 | |
| Trinidad and Tobago | First past the post | 36 | |
| Turkmenistan | Runoff | 50 | |
| Tuvalu | First past the post | 12 | |
| Uganda | First past the post | 214 | |
| United Kingdom | House of Commons | First past the post | 659 |
| United States | House of Representatives | First past the post | 435 |
| Senate | First past the post | 100 | |
| Uzbekistan | Runoff | 250 | |
| Vietnam | Runoff | 393 | |
| Yemen | First past the post | 301 | |
| Zambia | First past the post | 150 | |
| Zimbabwe | First past the post | 120 |
| Country | Body | System | Seats per District | Total seats | threshold |
|---|---|---|---|---|---|
| Albania | Parallel-Runoff | ||||
| Algeria | Party list | 430 | |||
| Andorra | Parallel-Bloc voting | 28 | |||
| Angola | Party list | 220 | |||
| Argentina | Party list | 257 | |||
| Armenia | Parallel-FPTP | 189 | |||
| Australia | Senate | STV | 6 or 2 | 76 | |
| Austria | Nationalrat | Party list | 183 | 4% | |
| Azerbaijan | Parallel-Runoff | 125 | |||
| Bahrain | FPTP-Bloc voting | 30 | |||
| Belgium | Chamber of Representatives | Party list | 3-22 | 150 | 5% |
| Benin | Party list | 83 | |||
| Bermuda | Bloc voting | 40 | |||
| Bolivia | AMS | 130 | |||
| Bosnia and Herzegovina | Party list | 240 | |||
| Brazil | Party list | 513 | |||
| Bulgaria | Sobranye | Party list | 240 | 4% | |
| Burkina Faso | Party list | 111 | |||
| Burundi | Party list | 81 | |||
| Cambodia | Party list | 120 | |||
| Cameroon | Parallel-FPTP | 180 | |||
| Cape Verde | Party list | 79 | |||
| Chad | Parallel-Runoff | 125 | |||
| Chile | Party list | 120 | |||
| Colombia | Party list | 168 | |||
| Costa Rica | Party list | 57 | |||
| Croatia | Sabor | Parallel-Party list | 140 | 5% | |
| Cyprus | Party list | 80 | |||
| Czech Republic | Poslanecká Sněmovna | Party list | 5-25 | 200 | 5% (8% for coalitions) |
| Denmark | Party list | 179 | |||
| Djibouti | Party-block voting | 65 | |||
| Dominican Republic | Party list | 120 | |||
| East Timor | Parallel-Party list | ||||
| Ecuador | Parallel-Party-block voting | 77 | |||
| El Salvador | Party list | 84 | |||
| Equatorial Guinea | Party list | 80 | |||
| Eritrea | Party list | 130 | |||
| Estonia | Riigikogu | Party list | 101 | 5% | |
| Finland | Party list | 200 | |||
| Georgia | Parallel-Runoff | 235 | |||
| Germany | Bundestag | AMS | n/a | 603 (variable) | 5% |
| Greece | Party list | 300 | |||
| Guatemala | Parallel-FPTP | 80 | |||
| Guinea | Parallel-FPTP | 114 | |||
| Guyana | Party list | 53 | |||
| Honduras | Parallel-FPTP | 128 | |||
| Hungary | AMS | 386 | |||
| Iceland | Party list | 63 | |||
| Indonesia | Party list | 425 | |||
| Ireland | Dáil Éireann | STV | 3-5 | 1661 | n/a |
| Israel | Knesset | d'Hondt method | 120 | 120 | 1.5% |
| Italy | AMS | 630 | |||
| Ivory Coast | FPTP-Bloc voting | 175 | |||
| Japan | Parallel-FPTP | 500 | |||
| Jordan | SNTV | 80 | |||
| Kuwait | Bloc voting | 50 | |||
| Laos | Bloc voting | 85 | |||
| Latvia | Saeima | Party list | 14-28 | 100 | 5% |
| Lebanon | Party-block voting | 128 | |||
| Lesotho | AMS | 65 | |||
| Liberia | Party list | 64 | |||
| Liechtenstein | Party list | 25 | |||
| Lithuania | Parallel-Runoff | 141 | |||
| Luxembourg | Party list | 60 | |||
| Madagascar | Parallel-FPTP | 138 | |||
| Maldives | Bloc voting | 40 | |||
| Malta | STV | 65 | |||
| Mauritius | Bloc voting | 70 | |||
| Mexico | AMS | 500 | |||
| Federated States of Micronesia | Parallel-FPTP | 14 | |||
| Moldova | Party list | 104 | |||
| Mozambique | Party list | 250 | |||
| Namibia | Party list | 72 | |||
| Netherlands | Party list | 150 | |||
| New Zealand | AMS | 120 | 5% | ||
| Nicaragua | Party list | 92 | |||
| Niger | Parallel-FPTP | 83 | |||
| Niue | FPTP-Bloc voting | ||||
| Norway | Party list | 165 | |||
| Panama | Parallel-FPTP | 72 | |||
| Paraguay | Party list | 80 | |||
| Peru | Party list | 120 | |||
| Philippines | Parallel-FPTP | 204 | |||
| Poland | Sejm | D'Hondt method | 7-19 | 460 | 5% (8% for coalitions) |
| Senate | FPTP bloc voting | 2-4 | 100 | ||
| Portugal | Party list | 230 | |||
| Republic of China (Taiwan) | Legislative Yuan | Parallel-SNTV | 225 | 5% | |
| Republic of Macedonia | Parallel-Runoff | 120 | |||
| Romania | Party list | 328 | |||
| Russia | Duma | Parallel-FPTP | 450 | ||
| Samoa | FPTP-Bloc voting | 47 | |||
| San Marino | Party list | 60 | |||
| Sao Tomé and Principe | Party list | 55 | |||
| Scotland | Scottish Parliament | AMS | 8x7 MSP | 129 | |
| Senegal | Parallel-Party-block voting | 120 | |||
| Serbia and Montenegro | Skupština | Party list | |||
| Seychelles | Parallel-FPTP | 33 | |||
| Singapore | Party-block voting-FPTP | 83 | |||
| Slovakia | Party list | 150 | |||
| Slovenia | Party list | 90 | |||
| South Africa | Party list | 400 | |||
| South Korea | Parallel-FPTP | 299 | |||
| Spain | Congress | Party list | 350 | ||
| Senate | 2-4 | 299 | |||
| Sri Lanka | Party list | 225 | |||
| Suriname | Party list | 51 | |||
| Sweden | Party list | 349 | |||
| Switzerland | Party list | 200 | |||
| Thailand | Bloc voting | 391 | |||
| Tunisia | Parallel-Party-block voting | 163 | |||
| Turkey | Party list | 550 | |||
| Ukraine | Parallel-FPTP | 450 | |||
| Uruguay | Party list | 99 | |||
| Vanuatu | SNTV | 50 | |||
| Venezuela | AMS | 203 | |||
| Wales | National Assembly for Wales | AMS | 5x4 AC | 60 |
Much of the data regarding which voting system is used is drawn from this 2002 report (http://www.idea.int/esd/data/world.cfm) from the Institute for Democracy and Electoral Assistance.
Much of the data regarding the size of the parliaments comes from this 1997 report (http://www.idea.int/publications/esd/english/esd_english_part2.pdf) from the same Institute.
Some of the data has been updated since then.
1 The Ceann Comhairle or Speaker of Dáil Éireann is returned automatically for whichever constituency s/he was elected if they wish to seek re-election, reducing the number of seats contested in that constituency by one. (In that case, should the Ceann Comhairle be from a three-seater, only two seats are contested in the general election from there.) As a result, if the Ceann Comhairle wishes to be in the next Dáil, only 165 seats are actually contested in a general election.