Swimming at the 2023 World Aquatics Championships – Men's 100 metre backstroke

The men's 100 metre backstroke competition at the 2023 World Aquatics Championships was held on 24 and 25 July 2023.

Records
Prior to the competition, the existing world and championship records were as follows.

Heats
The heats were started on 24 July at 10:51.

Semifinals
The semifinals were started on 24 July at 20:17.

Final
The final was held on 25 July at 20:59.