Katie Ledecky

Katie Ledecky is the most dominant female distance swimmer in history, with 14 Olympic medals (10 gold) across the 2012, 2016, 2020, and 2024 Games, and she once held 14 individual world records simultaneously. Her 2016 Rio 800m freestyle victory had a margin of 11.38 seconds over silver—the largest winning margin in Olympic swimming history—and is 30% wider than the typical distance race margin. At the 2024 Paris Olympics, she became the most decorated American female Olympian, outperforming any other woman on this list by total gold count.