Nearly every country in the world has some form of parliament. Parliamentary systems fall into two categories: bicameral and unicameral. Out of 190 parliaments in the world, 79 are bicameral (158 chambers) and 111 are unicameral, making a total of 269 chambers of parliament with some 44,000 members of parliament. IPU membership is made up of 178 national parliaments. Discover
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.