2024 World Aquatics Swimming Championships (25 m) – Men's 100 metre breaststroke

The Men's 100 metre breaststroke event at the 2024 World Aquatics Swimming Championships (25 m) was a swimming competition held as part of the short course championships. It featured male swimmers competing in a breaststroke race over a distance of 100 metres (four lengths of a 25-metre pool). The event consisted of preliminary heats, semifinals (if applicable), and a final race. The swimmers with the fastest times in the preliminary heats advanced to the semifinals, and then the fastest swimmers from the semifinals advanced to the final. The swimmer with the fastest time in the final was declared the winner and awarded the gold medal. Silver and bronze medals were awarded to the second and third-place finishers, respectively. The event formed part of the broader program of swimming competitions at the championships, which also included other individual and relay events across various strokes and distances. Details regarding specific dates, times, qualifying standards, and the number of participants can be found in the official event program and results published by World Aquatics (formerly FINA).