The women’s march organizers estimated that 4,797,500 people took part in 673 marches around the world, including Malawi, Iceland and Chile, all the way to Thailand. Trump’s inauguration had an estimated 160,000 attendees, according to the New York Times.
The graph below compares the crowd of an estimated 470,000 people at the Women’s March on Washington with Trump’s inaugural crowd.
Source: Keith Still, Professor of Crowd Science at Manchester Metropolitan University and Marcel Altenburg, Manchester Metropolitan University as well as estimates from the organizers at womensmarch.com.