- Sutton Coldfield Grammar School for Girls
- 1,161 people
- United Kingdom (Sutton Coldfield)
The largest gathering of people wearing conical party hats is 1,161, and was achieved by Sutton Coldfield Grammar School for Girls in Sutton Coldfield, UK, on 30 January 2019.
This attempt took place as part of the school's annual Wellbeing week to celebrate the schools 90th anniversary.