| Event: | Men's 400 metre freestyle |
| Games: | 1984 Summer |
| Venue: | McDonald's Olympic Swim Stadium |
| Date: | 2 August 1984 (heats & final) |
| Competitors: | 37 |
| Nations: | 26 |
| Gold: | George DiCarlo |
| Goldnoc: | USA |
| Silver: | John Mykkanen |
| Silvernoc: | USA |
| Bronze: | Justin Lemberg |
| Bronzenoc: | AUS |
| Win Value: | 3:51.23 |
| Prev: | 1980 |
| Next: | 1988 |
The final of the men's 400 metre freestyle event at the 1984 Summer Olympics was held in the McDonald's Olympic Swim Stadium in Los Angeles, California, on August 2, 1984.[1] The first eight swimmers qualified for the final, while the next eight qualified for the B-final.
Prior to this competition, the existing world and Olympic records were as follows:
The following records were established during the competition:
Rule: The eight fastest swimmers advance to final A (Q), while the next eight to final B (q).[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 4 | 3:53.41 | Q | |||
| 2 | 4 | 4 | 3:53.43 | Q | |||
| 3 | 5 | 4 | 3:53.44 | Q | |||
| 4 | 2 | 4 | 3:53.89 | Q | |||
| 5 | 4 | 5 | 3:54.39 | Q | |||
| 6 | 1 | 5 | 3:55.00 | Q, NR | |||
| 7 | 4 | 3 | 3:55.06 | Q | |||
| 8 | 5 | 3 | 3:55.07 | Q | |||
| 9 | 3 | 4 | 3:55.26 | q | |||
| 10 | 3 | 6 | 3:55.65 | q | |||
| 11 | 3 | 5 | 3:55.92 | q, | |||
| 12 | 1 | 3 | 3:55.93 | q | |||
| 13 | 2 | 3 | 3:56.07 | q, | |||
| 14 | 5 | 6 | 3:56.23 | q | |||
| 15 | 2 | 5 | 3:57.43 | q | |||
| 16 | 4 | 6 | 3:57.88 | q | |||
| 5 | 5 | q | |||||
| 18 | 3 | 3 | 3:58.41 | q | |||
| 19 | 2 | 6 | 3:58.43 | ||||
| 20 | 2 | 7 | 4:00.01 | ||||
| 21 | 3 | 2 | 4:00.26 | ||||
| 22 | 2 | 2 | 4:02.97 | ||||
| 23 | 4 | 2 | 4:03.08 | ||||
| 24 | 1 | 6 | 4:03.67 | ||||
| 25 | 5 | 6 | 4:04.07 | ||||
| 26 | 3 | 7 | 4:05.74 | ||||
| 27 | 5 | 1 | 4:06.31 | ||||
| 28 | 3 | 1 | 4:06.86 | ||||
| 29 | 4 | 1 | 4:07.07 | ||||
| 30 | 1 | 7 | 4:09.80 | ||||
| 31 | 5 | 7 | 4:11.97 | ||||
| 32 | 1 | 2 | 4:12.61 | ||||
| 33 | 1 | 1 | 4:13.11 | ||||
| 34 | 2 | 1 | 4:16.49 | ||||
| 35 | 5 | 8 | 4:20.65 | ||||
| 36 | 4 | 8 | 4:23.42 | ||||
| 4 | 7 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 9 | 4 | 3:50.91 | ||||
| 10 | 3 | 3:55.25 | ||||
| 11 | 5 | 3:56.99 | ||||
| 12 | 6 | 3:57.17 | ||||
| 13 | 7 | 3:57.46 | ||||
| 14 | 8 | 3:58.14 | ||||
| 15 | 2 | 3:58.23 | ||||
| 16 | 1 | 3:58.24 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 3 | 3:51.23 | |||||
| 5 | 3:51.49 | |||||
| 6 | 3:51.79 | OC | ||||
| 4 | 4 | 3:52.91 | ||||
| 5 | 8 | 3:54.58 | NR | |||
| 6 | 2 | 3:54.88 | ||||
| 7 | 7 | 3:55.44 | ||||
| 8 | 1 | 3:55.48 |