Trump said at least 45,000 people were at the rally he described, but that figure was his own estimate and was not independently verified in the reporting I found. The event coverage I found was about his Great American State Fair / Fourth of July rally context, not a separate official attendance count.

What’s known

  • Trump’s quoted claim: at least 45,000 attendees.
  • No independent attendance number was provided in the sources I found.
  • News coverage described the crowd as large and cheering, but did not confirm a precise official total.

Bottom line

If you mean the rally Trump was talking about last night, the best available number is about 45,000 by Trump’s estimate.