The temporary White House UFC arena was reported to hold about 4,500 to 5,000 people. Coverage also said a much larger crowd could watch from the Ellipse on screens, with estimates ranging far higher than the arena itself.

Capacity details

  • The built arena itself: about 4,500–5,000 seats.
  • Separate viewing areas nearby: reports mentioned around 100,000 spectators on the Ellipse for screen viewing.
  • Some other reporting described the venue as expected to accommodate over 4,000 attendees.

Why numbers vary

The difference comes from whether the source is describing:

  • the temporary arena on the South Lawn, or
  • the total event footprint , including people watching from the Ellipse.

Bottom line

If you mean the temporary arena itself , the best reported estimate is roughly 5,000 people.