According to Official Guinness Records,
The largest collection of Smurf memorabilia is 6,320 pieces, collected by Gerda P. Scheuers (USA) in Ripon, Wisconsin, USA, on 4 June 2014.
Scheuers started collecting Smurfs memorabilia as a child in the late 70s.
For a complete list of 2014 records, please visit 2014 Guinness Records in United States.