Katie Ledecky
Katinka Hosszu
Stat by stat
Bars are scaled to the leader in this list.
The verdict
Katie Ledecky leads 4 of 4 categories. Our all-time ranking places Katie Ledecky at #2 and Katinka Hosszu at #10.
The case for Katie Ledecky
The most dominant distance swimmer, man or woman, in history, and the most decorated female swimmer at the World Championships with 21-plus titles. Ledecky won the 800m freestyle at four consecutive Olympics (London 2012 at age 15, Rio 2016, Tokyo 2020 and Paris 2024), a feat unmatched in the event, and owns the world records in the 800m (8:04.79) and 1,500m (15:20.48) freestyle. Through Paris 2024 she held nine Olympic gold medals and 14 Olympic medals overall. Her dominance is defined by margin: she has beaten fields by bodylengths and gone years unbeaten in the 800m and 1,500m. Where Phelps ruled range, Ledecky rules depth, holding a tempo across a mile that no rival can sustain, arguably the greatest single-discipline swimmer ever.
The case for Katinka Hosszu
The 'Iron Lady', the most prolific racer of her generation and the queen of the individual medley. Hosszu won three gold medals at the Rio 2016 Olympics, in the 200m IM, 400m IM and 100m backstroke, and set world records in the 200m IM (2:06.12) and 400m IM (4:26.36) that showcased her all-round mastery. She amassed around nine world-championship titles and built an unprecedented career on the World Cup circuit, racing dozens of events per season for prize money and points, hence her nickname. Where most stars pick a lane, Hosszu contested every stroke and distance, and her medley dominance across the 2010s, combining butterfly, backstroke, breaststroke and freestyle at the highest level, made her one of the most versatile swimmers ever.