Comparative data on Parliaments: By Structure | Inter-Parliamentary Union

Reference:
Inter-Parliamentary Union. (2019, September 12). Compare data on Parliaments: Structure of parliament (unicameral and bicameral). Inter-Parliamentary Union. Retrieved September 12, 2019 from https://data.ipu.org/compare?field=country%3A%3Afield_structure_of_parliament#map & https://data.ipu.org/compare?field=country%3A%3Afield_structure_of_parliament#pie

The below images show the comparative data on parliaments with regard to the structure of parliament, that is, either unicameral or bicameral in nature taken from the Inter-Parliamentary Union website’s New Parline (the IPU’s Open Data Platform (beta): Your one-stop-shop for information about national parliaments) as of September 12, 2019.

IPU Aggregated data as of today (Data as of the 31st of December for past years):

Structure of parliament Number of countries
Bicameral 79
Unicameral 113

https://data.ipu.org/compare?field=country%3A%3Afield_structure_of_parliament#map

Source: Inter-Parliamentary Union Open Data
Date: 2019-09-12

Country Chamber Structure of parliament
1 Afghanistan House of the People, House of Elders Bicameral
2 Albania Parliament Unicameral
3 Algeria National People’s Assembly, Council of the Nation Bicameral
4 Andorra General Council Unicameral
5 Angola National Assembly Unicameral
6 Antigua and Barbuda House of Representatives, Senate Bicameral
7 Argentina Chamber of Deputies, Senate Bicameral
8 Armenia National Assembly Unicameral
9 Australia House of Representatives, Senate Bicameral
10 Austria National Council, Federal Council Bicameral
11 Azerbaijan National Assembly Unicameral
12 Bahamas House of Assembly, Senate Bicameral
13 Bahrain Shura Council, Council of Representatives Bicameral
14 Bangladesh Parliament Unicameral
15 Barbados House of Assembly, Senate Bicameral
16 Belarus House of Representatives, Council of the Republic Bicameral
17 Belgium House of Representatives, Senate Bicameral
18 Belize House of Representatives, Senate Bicameral
19 Benin National Assembly Unicameral
20 Bhutan National Assembly, National Council Bicameral
21 Bolivia (Plurinational State of) Chamber of Deputies, Chamber of Senators Bicameral
22 Bosnia and Herzegovina House of Representatives, House of Peoples Bicameral
23 Botswana National Assembly Unicameral
24 Brazil Chamber of Deputies, Federal Senate Bicameral
25 Brunei Darussalam Legislative Council Unicameral
26 Bulgaria National Assembly Unicameral
27 Burkina Faso National Assembly Unicameral
28 Burundi National Assembly, Senate Bicameral
29 Cabo Verde National Assembly Unicameral
30 Cambodia Senate, National Assembly Bicameral
31 Cameroon National Assembly, Senate Bicameral
32 Canada House of Commons, Senate Bicameral
33 Central African Republic National Assembly Unicameral
34 Chad National Assembly Unicameral
35 Chile Chamber of Deputies, Senate Bicameral
36 China National People’s Congress Unicameral
37 Colombia House of Representatives, Senate Bicameral
38 Comoros Assembly of the Union Unicameral
39 Congo National Assembly, Senate Bicameral
40 Costa Rica Legislative Assembly Unicameral
41 Côte d’Ivoire National Assembly, Senate Bicameral
42 Croatia Croatian Parliament Unicameral
43 Cuba National Assembly of the People’s Power Unicameral
44 Cyprus House of Representatives Unicameral
45 Czech Republic Senate, Chamber of Deputies Bicameral
46 Democratic People’s Republic of Korea Supreme People’s Assembly Unicameral
47 Democratic Republic of the Congo Senate, National Assembly Bicameral
48 Denmark The Danish Parliament Unicameral
49 Djibouti National Assembly Unicameral
50 Dominica House of Assembly Unicameral
51 Dominican Republic Chamber of Deputies, Senate Bicameral
52 Ecuador National Assembly Unicameral
53 Egypt House of Representatives Unicameral
54 El Salvador Legislative Assembly Unicameral
55 Equatorial Guinea Chamber of Deputies, Senate Bicameral
56 Eritrea National Assembly Unicameral
57 Estonia The Estonian Parliament Unicameral
58 Eswatini House of Assembly, Senat Bicameral
59 Ethiopia House of Peoples’ Representatives, House of the Federation Bicameral
60 Fiji Parliament Unicameral
61 Finland Parliament Unicameral
62 France National Assembly, Senate Bicameral
63 Gabon National Assembly, Senate Bicameral
64 Gambia (The) National Assembly Unicameral
65 Georgia Parliament Unicameral
66 Germany German Bundestag, Federal Council Bicameral
67 Ghana Parliament Unicameral
68 Greece Hellenic Parliament Unicameral
69 Grenada House of Representatives, Senate Bicameral
70 Guatemala Congress of the Republic Unicameral
71 Guinea National Assembly Unicameral
72 Guinea-Bissau People’s National Assembly Unicameral
73 Guyana Parliament of the Co-operative Republic of Guyana Unicameral
74 Haiti Chamber of Deputies, Senate Bicameral
75 Honduras National Congress Unicameral
76 Hungary National Assembly Unicameral
77 Iceland Parliament Unicameral
78 India House of the People, Council of States Bicameral
79 Indonesia House of Representatives Unicameral
80 Iran (Islamic Republic of) Islamic Parliament of Iran Unicameral
81 Iraq Council of Representatives of Iraq Unicameral
82 Ireland House of Representatives, Senate Bicameral
83 Israel Parliament Unicameral
84 Italy Chamber of Deputies, Senate Bicameral
85 Jamaica House of Representatives, Senate Bicameral
86 Japan House of Representatives, House of Councillors Bicameral
87 Jordan House of Representatives, Senate Bicameral
88 Kazakhstan House of Representatives, Senate Bicameral
89 Kenya National Assembly, Senate Bicameral
90 Kiribati House of Assembly Unicameral
91 Kuwait National Assembly Unicameral
92 Kyrgyzstan Supreme Council Unicameral
93 Lao People’s Democratic Republic National Assembly Unicameral
94 Latvia Parliament Unicameral
95 Lebanon National Assembly Unicameral
96 Lesotho National Assembly, Senate Bicameral
97 Liberia House of Representatives, The Liberian Senate Bicameral
98 Libya House of Representatives Unicameral
99 Liechtenstein Diet Unicameral
100 Lithuania Parliament Unicameral
101 Luxembourg Chamber of Deputies Unicameral
102 Madagascar National Assembly, Senate Bicameral
103 Malawi National Assembly Unicameral
104 Malaysia House of Representatives, Senate Bicameral
105 Maldives People’s Majlis Unicameral
106 Mali National Assembly Unicameral
107 Malta House of Representatives Unicameral
108 Marshall Islands Parliament Unicameral
109 Mauritania National Assembly Unicameral
110 Mauritius National Assembly Unicameral
111 Mexico Chamber of Deputies, Senate Bicameral
112 Micronesia (Federated States of) Congress Unicameral
113 Monaco National Council Unicameral
114 Mongolia State Great Hural Unicameral
115 Montenegro Parliament Unicameral
116 Morocco House of Representatives, House of Councillors Bicameral
117 Mozambique Assembly of the Republic Unicameral
118 Myanmar House of Representatives, House of Nationalities Bicameral
119 Namibia National Assembly, National Council Bicameral
120 Nauru Parliament Unicameral
121 Nepal House of Representatives, National Assembly Bicameral
122 Netherlands House of Representatives, Senate Bicameral
123 New Zealand House of Representatives Unicameral
124 Nicaragua National Assembly Unicameral
125 Niger National Assembly Unicameral
126 Nigeria House of Representatives, Senate Bicameral
127 North Macedonia Assembly of the Republic Unicameral
128 Norway Parliament Unicameral
129 Oman Consultative Council, State Council Bicameral
130 Pakistan National Assembly, Senate Bicameral
131 Palau House of Delegates, Senate Bicameral
132 Panama National Assembly Unicameral
133 Papua New Guinea National Parliament Unicameral
134 Paraguay Chamber of Deputies, Senate Bicameral
135 Peru Congress of the Republic Unicameral
136 Philippines House of Representatives, Senate Bicameral
137 Poland Sejm, Senate Bicameral
138 Portugal Assembly of the Republic Unicameral
139 Qatar Shura Council Unicameral
140 Republic of Korea National Assembly Unicameral
141 Republic of Moldova Parliament Unicameral
142 Romania Chamber of Deputies, Senate Bicameral
143 Russian Federation State Duma, Council of the Federation Bicameral
144 Rwanda Chamber of Deputies, Senate Bicameral
145 Saint Kitts and Nevis National Assembly Unicameral
146 Saint Lucia House of Assembly, Senate Bicameral
147 Saint Vincent and the Grenadines House of Assembly Unicameral
148 Samoa Legislative Assembly Unicameral
149 San Marino Great and General Council Unicameral
150 Sao Tome and Principe National Assembly Unicameral
151 Saudi Arabia Shura Council Unicameral
152 Senegal National Assembly Unicameral
153 Serbia National Assembly Unicameral
154 Seychelles National Assembly Unicameral
155 Sierra Leone Parliament Unicameral
156 Singapore Parliament Unicameral
157 Slovakia National Council Unicameral
158 Slovenia National Assembly, National Council Bicameral
159 Solomon Islands National Parliament Unicameral
160 Somalia Upper House, House of the People Bicameral
161 South Africa National Assembly, National Council of Provinces Bicameral
162 South Sudan Transitional National Legislative Assembly, Council of States Bicameral
163 Spain Congress of Deputies, Senate Bicameral
164 Sri Lanka Parliament Unicameral
165 Suriname National Assembly Unicameral
166 Sweden Parliament Unicameral
167 Switzerland National Council, Council of States Bicameral
168 Syrian Arab Republic People’s Assembly Unicameral
169 Tajikistan House of Representatives, National Assembly Bicameral
170 Thailand House of Representatives, Senate Bicameral
171 Timor-Leste National Parliament Unicameral
172 Togo National Assembly Unicameral
173 Tonga Legislative Assembly Unicameral
174 Trinidad and Tobago House of Representatives, Senate Bicameral
175 Tunisia Assembly of People’s Representatives Unicameral
176 Turkey Grand National Assembly of Turkey Unicameral
177 Turkmenistan Assembly Unicameral
178 Tuvalu Parliament of Tuvalu Unicameral
179 Uganda Parliament Unicameral
180 Ukraine Parliament Unicameral
181 United Arab Emirates Federal National Council Unicameral
182 United Kingdom House of Commons, House of Lords Bicameral
183 United Republic of Tanzania National Assembly Unicameral
184 United States of America House of Representatives, Senate Bicameral
185 Uruguay House of Representatives, Senate Bicameral
186 Uzbekistan Legislative Chamber, Senate Bicameral
187 Vanuatu Parliament Unicameral
188 Venezuela (Bolivarian Republic of) National Assembly Unicameral
189 Viet Nam National Assembly Unicameral
190 Yemen House of Representatives, Consultative Council Bicameral
191 Zambia National Assembly Unicameral
192 Zimbabwe National Assembly, Senate Bicameral

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