FINAL UPDATE 3:00 PM ET Oct. 20: After adding new data, our median estimate is 5.0 million, and the upper bound is 6.5. The numbers in this article have been updated. Future estimates will be updated on the spreadsheet, but not here.
Second "No Kings Day" protests the largest single-day political protest ever*, with 5-6.5 million participants
Here are the initial results from our crowdsourced crowd-counting estimates
