The men's 100m backstroke events at the 2023 World Para Swimming Championships were held at the Manchester Aquatics Centre between 31 July and 6 August.
Entering the event, the World and championship records were as follows: 12 swimmers took part.
The Top eight, regardless of heat, progress to the final[4] Eight swimmers from seven nations took part.
Entering the event, the World and championship records were as follows: 13 swimmers took part.
The Top eight, regardless of heat, progress to the final[6] Eight swimmers from seven nations took part.