The reports I found do not give one exact attendance figure for the 250th July 4th celebration, but they do indicate thousands of people attended in Washington, D.C.

What the coverage says

  • CBC describes ā€œthousands of Trump faithfulā€ gathering in Washington to mark the 250th birthday.
  • Other coverage focuses on the fireworks, flyovers, heat, and weather disruptions rather than publishing a final crowd count.
  • The event organizersā€™ page highlights logistics such as water stations, which suggests a large public turnout, but it does not provide a total attendance number.

Best answer

So, the most accurate answer from the available reporting is: no confirmed exact count was published, but attendance was in the thousands.

Context

This appears to have been the National Mall ā€œSalute to America 250ā€ celebration tied to the United Statesā€™ 250th anniversary. Would you like me to summarize the crowd estimates by source in a small table?