The best available public estimate I found is that President Trump claimed 375,000 people were there before thunderstorms forced evacuations, but there’s no independent verification of that figure. A separate report also said he claimed at least 45,000 attended an earlier America 250 kickoff event, though that was for a different celebration.

What’s known

  • For the National Mall America 250 event, the only number surfaced in reporting is Trump’s claim of 375,000 attendees before people were evacuated.
  • News coverage noted that this figure is not independently confirmed.
  • Another America 250 kickoff event was described by Trump as drawing at least 45,000 people, but that was a separate gathering.

Practical read

So, the honest answer is: nobody has a verified exact count yet , and the most repeated public figure is Trump’s 375,000 claim for the main Washington event.

TL;DR

  • Main July 4 America 250 event: 375,000 claimed , unverified.
  • Earlier kickoff event: 45,000 claimed , separate event.