Up to 500,000 people went to the Women's March on Washington in January. There has been disagreement over this number. However, a digital services company estimated there were 440,000 marchers, maybe half a million. It was the biggest US protest since the Vietnam War protests. The New York Times said the Women's March was three times bigger than President Donald Trump's inauguration. Five million people joined marches around the world.

The Women's March was a global protest for women's rights. Marchers also focused on immigration, healthcare, the environment, LGBTQ rights, racial equality, freedom of religion and workers' rights. They sent, "a bold message" to the new Trump government, "that women's rights are human rights". Organisers said: "We will not rest until women have…parity at all levels of leadership in society….There is no true peace without justice and equity for all."