- Chris Duffin
- 454.318 kilogram(s)
- United States (Clackamas)
The heaviest one repetition sumo deadlift is 454.318 kg (1001 lbs 9.6 oz) and was achieved by Chris Duffin (USA) at Kabuki Strength Lab in Clackamas, Oregon, USA, on 11 October 2016.
Chris Duffin made his record-breaking attempt as part of a fundraiser to support the Portland Home Builders Foundation, an organisation that builds housing for people experiencing homelessness.