According to Official Guinness Records,
The most targets hit with a bullwhip in one minute is 70, and was achieved by Jack Lepiarz (USA) in Bordentown, New Jersey, USA, on 11 June 2017. The bullwhip used was a 5 ft, 1in long, kangaroo-hide bullwhip made by Victor “Skip” SanSoucie. The attempt took place in front of a live crowd at the New Jersey Renaissance Faire.
For a complete list of 2017 records, please visit 2017 Guinness Records in United States.