June 26, 2025 - The first Earth Day on April 22, 1970, was the largest single-day protest in U.S. history, with an estimated 20 million participants.

3 days ago - This list includes U.S. protests with at least 101,000 participants, ordered by peak single-day protestor turnout. Events spanning multiple locations are highlighted in yellow. In 1995, the National Park Service estimated that 400,000 people attended the Million Man March in Washington, D.C., ...

The main event of this worldwide protest took place in DC, with numerous other gatherings held across the country; in total, the Women’s March was the largest single-day protest in U.S. history. Attendance at the DC event was estimated at 470,000 people. The demonstrations advocated for a range of causes, including women’s rights, immigration reform, healthcare reform, LGBTQ+ rights, racial equality and freedom of religion.

June 16, 2025 - I imagine it would be a pretty depressing number but I could also see it being the case that people who made it to a protest are pretty high propensity and more politically engaged on average ... I’d imagine that very few people who bothered to protest didn’t bother to vote. ... I disagree. Don't underestimate the power of wanting to hang out with large groups of like minded people on a nice spring day.

In Seattle, when a crowd of about 90,000 sets off through the city streets the line stretches for nearly 1.5 miles. Nationwide, some 7 million participate in No Kings protests; organizers claim it to be the largest single-day protest gathering ...

July 1, 2024 - 18, 1991, approximately 500 women marched in Minnesota carrying faceless cardboard cutouts of women, representing those who had been killed by abusers. They called it the Silent Witness March and walked wordlessly to the Minnesota State Capitol ...

3 weeks ago - When Carmen Perez-Jordan was first asked to organize a national protest for women’s rights, following Donald Trump’s first presidential election win, she did not anticipate that it would become the largest single-day protest in American history. On 21 January 2017, more than 500,000 protesters took to the streets of Washington DC, and as many as 4 million participated in affiliated demonstrations nationwide. Looking back, Perez-Jordan says the Women’s March engaged millions of people in activism for the first time, inspired other movements like #MeToo and pushed people to see women’s issues beyond reproductive rights. “It was unquestionably impactful,” Perez-Jordan said.

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1 week ago - "No Kings" protests took place across the US (but avoided Washington, D.C.) on June 14, 2025, the day of the U.S. Army 250th Anniversary Parade and Donald Trump's 79th birthday. These events, in over 2,000 locations and attended by an estimated ...

October 18, 2025 - In what organizers and participants say might be the "largest protest in US history" in a single day, No Kings demonstrations are set to take place in more than 2,500 communities across the nation, from its biggest cities to small towns like ...

Recent research conducted by the Crowd Sourcing Consortium revealed that 15 million to 26 million people in the United States have participated in George Floyd protests. Teams of crowd counters are noting the numbers they are recording are ...

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June 17, 2025 - Millions of Americans across the country joined ”No Kings Day” rallies to defend our democracy, to speak out against the unfettered power grab by Donald Trump, and to oppose Stephen Miller’s mass deportation machine.

December 19, 2023 - Among the most famous protests in U.S. history is the 1963 March on Washington for Jobs and Freedom. Organizers described this event as a “living petition.” The day is perhaps most remembered for the Rev.

June 1, 2020 - The Women's March in 2017 was the largest march in US history, attracting between 3.2 and 5.2 million people. Over the past week, protests sparked by the death of George Floyd have seen tens of thousands march against systemic racism and the ...

August 12, 2025 - However, we estimate the turnout at No Kings to be substantially larger than the turnout at the Hands Off protests on April 5, which mobilized a significant number as well — between 919,000 and 1.5 million people.

October 12, 2021 - The primary demonstration took place in Washington, DC, drawing a crowd of more than 470,000, but the total number of people who participated in the protests nationwide was between 3.3 and 5.6 million, making the Women’s March the largest one-day protest in US history.

2 weeks ago - As “Operation Midway Blitz” intensified in September, officials erected barricades and “protest zones” around the Broadview ICE facility. State police in riot gear lined perimeters, while federal agents repeatedly fired tear gas and ...