Every country in the world has some form of parliament. Parliamentary systems fall into two categories: bicameral and unicameral. Out of 193 countries in the world, 79 are bicameral and 113 are unicameral, making a total of 272 chambers of parliament with over 46,000 members of parliament. IPU membership is made up of 178 national parliaments. Discover the world's national
The IPU has been collecting data on parliaments since its inception in 1889, including information on women’s participation in politics since 1945. In this section, discover the IPU's knowledge bank for and about parliaments.