| Swimmer | Q. time | Birth | L | Heat |
| -. Florent Manaudou | FRA | 21.32s | 1990 | 4 | Heat 12 |
| -. Anthony Ervin | USA | 21.55s | 1981 | 4 | Heat 11 |
| -. Marco Orsi | ITA | 21.64s | 1990 | 4 | Heat 10 |
| -. Vladimir Morozov | RUS | 21.65s | 1992 | 5 | Heat 12 |
| -. Bruno Fratus | BRA | 21.74s | 1989 | 5 | Heat 11 |
| -. Benjamin Proud | GBR | 21.76s | 1994 | 5 | Heat 10 |
| -. Cesar Cielo Filho | BRA | 21.84s | 1987 | 3 | Heat 12 |
| -. Matthew Abood | AUS | 21.87s | 1986 | 3 | Heat 11 |
| -. Krisztian Takacs | HUN | 21.89s | 1985 | 3 | Heat 10 |
| -. Katsumi Nakamura | JPN | 21.90s | 1994 | 6 | Heat 12 |
| -. Ari-Pekka Liukkonen | FIN | 21.93s | 1989 | 6 | Heat 11 |
| -. Zetao Ning | CHN | 21.95s | 1993 | 6 | Heat 10 |
| -. Kristian Gkolomeev | GRE | 21.96s | 1993 | 2 | Heat 12 |
| -. Nathan Adrian | USA | 21.97s | 1988 | 2 | Heat 11 |
| -. Hexin Yu | CHN | 22.00s | 1996 | 2 | Heat 10 |
| -. Andrey Grechin | RUS | 22.01s | 1987 | 7 | Heat 12 |
| -. Andrii Govorov | UKR | 22.02s | 1992 | 7 | Heat 11 |
| -. Shinri Shioura | JPN | 22.04s | 1991 | 7 | Heat 10 |
| -. Clement Mignon | FRA | 22.08s | 1993 | 1 | Heat 12 |
| -. Luca Dotto | ITA | 22.12s | 1990 | 1 | Heat 11 |
| -. Francois Heersbrandt | BEL | 22.17s | 1989 | 1 | Heat 10 |
| -. Odyssefs Meladinis | GRE | 22.18s | 1990 | 8 | Heat 12 |
| -. Jasper Aerents | BEL | 22.19s | 1992 | 8 | Heat 11 |
| -. Karl Krug IV | CAN | 22.21s | 1989 | 8 | Heat 10 |
| -. Alejandro Escudero | MEX | 22.24s | 1990 | 0 | Heat 12 |
| Standard A: 22.25s |
| -. Renzo Tjon-A-Joe | SUR | 22.30s | 1995 | 0 | Heat 11 |
| -. Simonas Bilis | LTU | 22.31s | 1993 | 0 | Heat 10 |
| -. Marius Radu | ROU | 22.44s | 1992 | 9 | Heat 12 |
| -. Dylan Carter | TRI | 22.49s | 1996 | 9 | Heat 11 |
| -. Miguel Ortiz-Canavate | ESP | 22.52s | 1991 | 9 | Heat 10 |
| -. Pjotr Degtjarjov | EST | 22.59s | 1993 | 4 | Heat 9 |
| -. Geoffrey Robin Cheah | HKG | 22.61s | 1990 | 5 | Heat 9 |
| -. Boris Stojanovic | SRB | 22.70s | 1989 | 3 | Heat 9 |
| -. Christoffer Carlsen | SWE | 22.71s | 1992 | 6 | Heat 9 |
| -. Demir Atasoy | TUR | 22.74s | 1987 | 2 | Heat 9 |
| -. Ali Ahmed Mahmoud Ali Khalafalla | EGY | 22.75s | 1996 | 7 | Heat 9 |
| -. Mario Todorovic | CRO | 22.76s | 1988 | 8 | Heat 9 |
| -. Cristian Quintero | VEN | 22.76s | 1992 | 1 | Heat 9 |
| -. Anton Latkin | BLR | 22.81s | 1994 | 0 | Heat 9 |
| -. Luis Armando Flores Bellina | PUR | 22.84s | 1994 | 9 | Heat 9 |
| -. Gabriel Melconian | URU | 22.87s | 1987 | 4 | Heat 8 |
| -. Sidni Hoxha | ALB | 22.89s | 1992 | 5 | Heat 8 |
| -. Mohammed Madouh | KUW | 23.00s | 1987 | 6 | Heat 8 |
| -. Virdhawal Vikram Khade | IND | 23.00s | 1991 | 3 | Heat 8 |
| -. Julien Henx | LUX | 23.03s | 1995 | 2 | Heat 8 |
| Standard B: 23.03s |
| -. Jordan Augier | LCA | 23.08s | 1994 | 7 | Heat 8 |
| -. Oliver Elliot | CHI | 23.10s | 1987 | 1 | Heat 8 |
| -. Andrew Chetcuti | MLT | 23.17s | 1992 | 8 | Heat 8 |
| -. Elvis Burrows | BAH | 23.24s | 1989 | 0 | Heat 8 |
| -. Meli Malani | FIJ | 23.32s | 1996 | 9 | Heat 8 |
| -. Stanislav Karnaukhov | KGZ | 23.47s | 1996 | 4 | Heat 7 |
| -. Maksim Inic | MNE | 23.49s | 1996 | 5 | Heat 7 |
| -. Anthony John Barbar | LIB | 23.51s | 1992 | 3 | Heat 7 |
| -. Sam Seghers | PNG | 23.55s | 1994 | 6 | Heat 7 |
| -. Vahan Mkhitaryan | ARM | 23.58s | 1996 | 2 | Heat 7 |
| -. Allan Gutierrez | HON | 23.63s | 1993 | 7 | Heat 7 |
| -. Lorenzo Loria | MEX | 23.63s | 1995 | 1 | Heat 7 |
| -. Mikel Schreuders | ARU | 23.63s | 1998 | 8 | Heat 7 |
| -. Thibaut Danho | CIV | 23.70s | 1994 | 4 | Heat 6 |
| -. Miguel Mena | NCA | 23.71s | 1997 | 0 | Heat 7 |
| -. Jagger Stephens | GUM | 23.75s | 1998 | 9 | Heat 7 |
| -. Issa Abdulla Hemed Mohamed | KEN | 23.79s | 1995 | 5 | Heat 6 |
| -. Frantz Mike Itelord Dorsainvil | HAI | 23.83s | 1991 | 3 | Heat 6 |
| -. Jhonny Perez | DOM | 23.89s | 1997 | 6 | Heat 6 |
| -. K M Abdoul Niane | SEN | 23.90s | 1988 | 2 | Heat 6 |
| -. Sidrell Nicholas Williams | JAM | 24.03s | 1996 | 7 | Heat 6 |
| -. CheranthaDe Silva K T | Fin | 24.19s | 1996 | 1 | Heat 6 |
| -. Samson Samuel Opuakpo Forcados | NGR | 24.21s | 1986 | 8 | Heat 6 |
| -. Athoumane Soule Soilihi | COM | 24.25s | 1991 | 0 | Heat 6 |
| -. Jose Quintanilla | BOL | 24.26s | 1997 | 9 | Heat 6 |
| -. Joao Aguiar | ANG | 24.42s | 1983 | 4 | Heat 5 |
| -. Saleh Faraj Sultan Fahran | BRN | 24.46s | 1996 | 5 | Heat 5 |
| -. Ahmad Mohamed Attellesey | LBA | 24.56s | 1995 | 3 | Heat 5 |
| -. Denilson Cardoso Da Costa | MOZ | 24.73s | 1998 | 6 | Heat 5 |
| -. Mohammad Zeyad J Abdo | PLE | 24.80s | 1993 | 2 | Heat 5 |
| -. Christian Nikles | BRU | 24.81s | 1997 | 7 | Heat 5 |
| -. Alex Sobers | BAR | 24.84s | 1998 | 1 | Heat 5 |
| -. Lum Zhaveli | KOS | 24.88s | 1990 | 8 | Heat 5 |
| -. Batsaikhan Dulguun | MGL | 24.90s | 1986 | 0 | Heat 5 |
| -. Hilal Hemed Hilal | TAN | 24.93s | 1994 | 9 | Heat 5 |
| -. Abeku Jackson | GHA | 24.98s | 2000 | 4 | Heat 4 |
| -. Valentin Gorshkov | TKM | 25.00s | 1997 | 5 | Heat 4 |
| -. Kerry Ollivierre | GRN | 25.15s | 1999 | 3 | Heat 4 |
| -. Noah Mascoll-Gomes | ANT | 25.26s | 1999 | 6 | Heat 4 |
| -. Mohammad Mahfizur Rahman | BAN | 25.34s | 1993 | 2 | Heat 4 |
| -. Ekirikubinza Joshua Tibatemwa | UGA | 25.78s | 1996 | 7 | Heat 4 |
| -. Giordan Harris | MHL | 26.00s | 1993 | 1 | Heat 4 |
| -. Sirish Gurung | NEP | 26.10s | 1998 | 8 | Heat 4 |
| -. Muhammad Saad | PAK | 26.19s | 1998 | 0 | Heat 4 |
| -. Abdelmalik Tofik Muktar | ETH | 26.20s | 1996 | 9 | Heat 4 |
| -. Temaruata Strickland | COK | 26.21s | 1999 | 4 | Heat 3 |
| -. Ibrahim Nishwan | MDV | 26.40s | 1997 | 5 | Heat 3 |
| -. Olim Kurbanov | TJK | 26.53s | 1998 | 3 | Heat 3 |
| -. Andrew Fowler | GUY | 26.61s | 1995 | 6 | Heat 3 |
| -. Dionisio Augustine | FSM | 26.75s | 1992 | 2 | Heat 3 |
| -. Billy-Scott Irakoze | BDI | 27.02s | 1996 | 7 | Heat 3 |
| -. Mohamed Muthasim Adnan | MDV | 27.08s | 1997 | 1 | Heat 3 |
| -. Tindwende Thierry Sawadogo | BUR | 27.16s | 1995 | 8 | Heat 3 |
| -. Shane Christopher Cadogan | VIN | 27.27s | 2001 | 0 | Heat 3 |
| -. Thonponloeu Hem | CAM | 27.30s | 1990 | 9 | Heat 3 |
| -. Jules Yao Bessan | BEN | 27.33s | 1979 | 4 | Heat 2 |
| -. Shawn Erbelau Dingilius Wallace | PLW | 27.33s | 1994 | 5 | Heat 2 |
| -. Takumi Sugie | NMA | 27.56s | 1998 | 3 | Heat 2 |
| -. Albarchir Mouctar | NIG | 27.83s | 1995 | 6 | Heat 2 |
| -. Brave Lifa | MAW | 28.01s | 1995 | 2 | Heat 2 |
| -. Patrick Rukundo | RWA | 28.02s | 1980 | 7 | Heat 2 |
| -. Abdelaziz M Ahmed | SUD | 28.34s | 1994 | 8 | Heat 2 |
| -. Santisouk Inthavong | LAO | 28.34s | 1999 | 1 | Heat 2 |
| -. Emeric Kpegba | TOG | 29.10s | 1999 | 0 | Heat 2 |
| -. Osman Kamara | SLE | 29.42s | 1987 | 9 | Heat 2 |
| -. Mael Ambonguilat | GAB | 29.64s | 1997 | 4 | Heat 1 |
| -. Mamadou A Soumare | MLI | 30.00s | 1992 | 3 | Heat 1 |
| -. Pap D Jonga | GAM | 30.00s | 1997 | 5 | Heat 1 |
| -. Amadou Camara | GUI | 30.05s | 1994 | 6 | Heat 1 |
| -. Charly Ndjoume | CMR | 30.07s | 1986 | 2 | Heat 1 |
| -. Ebrahim Esam Mohammed Al-Maleki | YEM | 32.27s | 1994 | 7 | Heat 1 |
| -. Shad Luis Perriere | CAF | 35.18s | 2000 | 1 | Heat 1 |
| -. Mokhoro Makara | LES | 36.00s | 1994 | 8 | Heat 1 |
| -. Ahmed Bourhan Alwan | DJI | 40.50s | 1998 | 0 | Heat 1 |
| -. Dienov Koka | CGO | &s | 1996 | 9 | Heat 1 |