# Swimming at the 2023 Pan American Games – Men's 400 metre freestyle

The men's 400 metre freestyle competition of the swimming events at the 2023 Pan American Games were held on October 21, 2023, at the Aquatic Center in Santiago, Chile.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | Paul Biedermann (GER) | 3:40.07 | Rome, Italy | July 26, 2009 |
| Pan American Games record | Ryan Cochrane (CAN) | 3:48.29 | Toronto, Canada | July 17, 2015 |
The following record was established during the competition:
| Date | Event | Swimmer | Nation | Time | Record |
| October 21 | Final | Guilherme Costa | Brazil | 3:46.79 | GR |

## Results

| KEY: | QA | Qualified for A final | QB | Qualified for B final | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best | WD | Withdrew |

### Heats

The first round was held on October 21.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 4 | Guilherme Costa | Brazil | 3:52.23 | QA |
| 2 | 3 | 3 | Jay Litherland | United States | 3:55.00 | QA |
| 3 | 3 | 5 | Alexander Steverink | Brazil | 3:55.21 | QA |
| 4 | 2 | 4 | Alfonso Mestre | Venezuela | 3:55.67 | QA |
| 5 | 3 | 1 | Dylan Porges | Mexico | 3:55.84 | QA |
| 6 | 2 | 5 | James Plage | United States | 3:55.90 | QA |
| 7 | 3 | 7 | Eduardo Cisternas | Chile | 3:56.31 | QA |
| 8 | 2 | 3 | Juan Morales | Colombia | 3:56.34 | QA |
| 9 | 2 | 6 | Santiago Corredor | Colombia | 3:56.75 | WD |
| 10 | 3 | 6 | Jeremy Bagshaw | Canada | 3:57.43 | WD |
| 11 | 3 | 2 | Joaquín Vargas | Peru | 3:57.78 | QB |
| 12 | 2 | 7 | Jose Cano | Mexico | 3:58.60 | QB |
| 13 | 2 | 2 | Yu Tong Wu | Canada | 3:59.11 | QB |
| 14 | 3 | 8 | Christian Bayo | Puerto Rico | 4:02.32 | QB |
| 15 | 2 | 1 | Diego Dulieu | Honduras | 4:02.45 | QB |
| 16 | 1 | 5 | Alberto Vega | Costa Rica | 4:05.79 | QB |
| 17 | 1 | 4 | Raekwon Noel | Guyana | 4:07.38 | QB |
| 18 | 1 | 7 | James Allison | Cayman Islands | 4:07.94 | QB |
| 19 | 1 | 3 | Gerald Hernandez | Nicaragua | 4:10.36 | |
| 20 | 2 | 8 | Noah Mascoll-Gomes | Antigua and Barbuda | 4:11.50 | |
| 21 | 1 | 1 | Luke-Kennedy Thompson | Bahamas | 4:11.61 | |
| 22 | 1 | 2 | Christopher Gossman | Independent Athletes Team | 4:13.21 | |
| 23 | 1 | 6 | Jose Campo | El Salvador | 4:25.68 | |

### Final B

The B final was also held on October 21.
| Rank | Lane | Name | Nationality | Time |
| 9 | 3 | Yu Tong Wu | Canada | 3:57.85 |
| 10 | 4 | Joaquín Vargas | Peru | 3:58.06 |
| 11 | 5 | Jose Cano | Mexico | 4:00.33 |
| 12 | 6 | Christian Bayo | Puerto Rico | 4:02.26 |
| 13 | 2 | Diego Dulieu | Honduras | 4:02.86 |
| 14 | 7 | Alberto Vega | Costa Rica | 4:05.54 |
| 15 | 1 | Raekwon Noel | Guyana | 4:05.82 |
| 16 | 8 | James Allison | Cayman Islands | 4:11.92 |

### Final A

The A final was also held on October 21.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Guilherme Costa | Brazil | 3.46.79 | GR |
| | 6 | Alfonso Mestre | Venezuela | 3:47.62 | |
| | 7 | James Plage | United States | 3:50.74 | |
| 4 | 5 | Jay Litherland | United States | 3:52.72 | |
| 5 | 3 | Alexander Steverink | Brazil | 3:53.77 | |
| 6 | 8 | Juan Morales | Colombia | 3:54.44 | |
| 7 | 2 | Eduardo Cisternas | Chile | 3:54.70 | |
| 8 | 1 | Dylan Porges | Mexico | 3:55.12 | |