2023 World Para Swimming Championships – Men's 100 metre butterfly

The men's 100m butterfly events at the 2023 World Para Swimming Championships were held at the Manchester Aquatics Centre between 31 July and 6 August.

S8
10 swimmers from eight nations took part. The swimmers with the top eight times, regardless of heat, advanced to the final.
 * Heats

The final was held on 2 August.
 * Final

S9
10 swimmers from seven nations took part. The swimmers with the top eight times, regardless of heat, advanced to the final.
 * Heats

The final was held on 2 August.
 * Final

S10
13 swimmers from ten nations took part. The swimmers with the top eight times, regardless of heat, advanced to the final.
 * Heats

The final was held on 4 August.
 * Final

S11
10 swimmers from seven nations took part. The swimmers with the top eight times, regardless of heat, advanced to the final.
 * Heats

The final was held on 1 August.
 * Final

S12
10 swimmers from eight nations took part. The swimmers with the top eight times, regardless of heat, advanced to the final.
 * Heats

The final was held on 1 August.
 * Final

S13
11 swimmers from seven nations took part. The swimmers with the top eight times, regardless of heat, advanced to the final.
 * Heats

The final was held on 31 July.
 * Final

S14
15 swimmers from ten nations took part. The swimmers with the top eight times, regardless of heat, advanced to the final.
 * Heats

The final was held on 6 August.
 * Final