According to Official Guinness Records,
The heaviest avocado is 2.495 kg (5 lbs 8 oz), and was achieved by Felicidad Pasalo (USA), in Hilo, Hawaii, USA, on 3 January 2018. Felicidad made her attempt to bring attention to the Big Island of Hawaii's record-breaking large fruits.
For a complete list of 2018 records, please visit 2018 Guinness Records in United States.