Ms. Manning noted that the #MeToo movement had put the spotlight on women’s rights. “We have more of a platform,” she said. “People are listening.”
Rebecca Park, a 29-year-old American who works at an art history foundation in Paris, said that when she took part in the women’s march last year, she was “motivated by anger and sadness” over Mr. Trump’s election.
“This time,” she said, “the goal is to channel those feelings into something productive.”
In London, Harini Iyengar, a spokeswoman for the Women’s Equality Party, was among those marching through the rain and snow. Her group was founded only a few years ago, but is the fastest-growing political party in Britain.
“My placard says, ‘We’ve been marching for 100 years,’ because after 100 years we still haven’t achieved the political will to end sexual violence against women and girls or workplace sexual harassment in the U.K.,” she said.
Another demonstrator, Hannah Mudd, 19, was moved by photos of the Women’s March in the United States.
“It was so inspiring,” she said. “I literally cried. The solidarity — of not being alone.”