# Swimming at the 1964 Summer Olympics – Men's 200 metre breaststroke

The men's 200 metre breaststroke event at the 1964 Summer Olympics took place between October 13 and October 15. This swimming event used the breaststroke. Because an Olympic-size swimming pool is 50 metres long, this race consisted of four lengths of the pool.

## Medalists

| Gold | Ian O'Brien Australia |
| Silver | Georgy Prokopenko Soviet Union |
| Bronze | Chet Jastremski United States |

## Results
### Heats

Heat 1
| Rank | Athlete | Country | Time | Note |
| 1 | Ian O'Brien | Australia | 2:31.4 | Q, OR |
| 2 | Tom Trethewey | United States | 2:33.4 | Q |
| 3 | Klaus Katzur | United Team of Germany | 2:36.7 | Q |
| 4 | Farid Zablith Filho | Brazil | 2:45.2 | |
| 5 | Wieger Mensonides | Netherlands | 2:47.4 | |
| 6 | Huỳnh Văn Hải | Vietnam | 2:51.6 | |
Heat 2
| Rank | Athlete | Country | Time | Note |
| 1 | Egon Henninger | United Team of Germany | 2:30.1 | Q, OR |
| 2 | Georgy Prokopenko | Soviet Union | 2:30.3 | Q |
| 3 | Ferenc Lenkei | Hungary | 2:38.6 | Q |
| 4 | Peter Tonkin | Australia | 2:39.3 | |
| 5 | Hemmie Vriens | Netherlands | 2:40.8 | |
| 6 | Amman Jalmaani | Philippines | 2:44.7 | |
| 7 | Elliot Chenaux | Puerto Rico | 2:52.5 | |
Heat 3
| Rank | Athlete | Country | Time | Note |
| 1 | Wayne Anderson | United States | 2:31.5 | Q |
| 2 | Osamu Tsurumine | Japan | 2:34.1 | Q |
| 3 | Rolando Landrito | Philippines | 2:41.9 | |
| 4 | Gian Corrado Gross | Italy | 2:42.8 | |
| 5 | Jin Jang-rim | South Korea | 2:48.6 | |
Heat 4
| Rank | Athlete | Country | Time | Note |
| 1 | Kenjiro Matsumoto | Japan | 2:33.8 | Q |
| 2 | Vladimir Kosinsky | Soviet Union | 2:35.6 | Q |
| 3 | Willi Messner | United Team of Germany | 2:36.0 | Q |
| 4 | Neil Nicholson | Great Britain | 2:36.6 | Q |
| 5 | Gershon Shefa | Israel | 2:40.6 | |
| 6 | Cesare Caramelli | Italy | 2:40.9 | |
| 7 | Miguel Angel Navarro | Argentina | 2:49.7 | |
Heat 5
| Rank | Athlete | Country | Time | Note |
| 1 | Chet Jastremski | United States | 2:30.5 | Q |
| 2 | Yoshiaki Shikiishi | Japan | 2:32.3 | Q |
| 3 | Aleksandr Tutakayev | Soviet Union | 2:36.9 | Q |
| 4 | John Oravainen | Australia | 2:38.7 | Q |
| 5 | Nazario Padrón | Spain | 2:40.5 | |
| 6 | Rudolf Brack | Switzerland | 2:46.0 | |
| 7 | Cheah Tong Kim | Malaysia | 2:46.2 | |
| 8 | Charles Fox | Northern Rhodesia | 2:49.1 | |

### Semifinals
#### Semifinal 1

| Rank | Athlete | Country | Time | Notes |
| 1 | Chet Jastremski | United States | 2:32.1 | Q |
| 2 | Wayne Anderson | United States | 2:32.6 | Q |
| 3 | Egon Henninger | United Team of Germany | 2:33.3 | Q |
| 4 | Osamu Tsurumine | Japan | 2:33.3 | Q |
| 5 | Tom Trethewey | United States | 2:34.5 | |
| 6 | Willi Messner | United Team of Germany | 2:35.5 | |
| 7 | Klaus Katzur | United Team of Germany | 2:37.3 | |
| 8 | Ferenc Lenkei | Hungary | 2:37.5 | |

#### Semifinal 2

| Rank | Athlete | Country | Time | Notes |
| 1 | Ian O'Brien | Australia | 2:28.7 | Q, OR |
| 2 | Georgy Prokopenko | Soviet Union | 2:29.7 | Q |
| 3 | Aleksandr Tutakayev | Soviet Union | 2:30.5 | Q |
| 4 | Vladimir Kosinsky | Soviet Union | 2:33.5 | Q |
| 5 | Kenjiro Matsumoto | Japan | 2:34.3 | |
| 6 | Yoshiaki Shikiishi | Japan | 2:34.5 | |
| 7 | John Oravainen | Australia | 2:39.6 | |
| 8 | Neil Nicholson | Great Britain | 2:39.9 | |

### Final

| Rank | Athlete | Country | Time | Notes |
| | Ian O'Brien | Australia | 2:27.8 | WR |
| | Georgy Prokopenko | Soviet Union | 2:28.2 | |
| | Chet Jastremski | United States | 2:29.6 | |
| 4 | Aleksandr Tutakayev | Soviet Union | 2:31.0 | |
| 5 | Egon Henninger | United Team of Germany | 2:31.1 | |
| 6 | Osamu Tsurumine | Japan | 2:33.6 | |
| 7 | Wayne Anderson | United States | 2:35.0 | |
| 8 | Vladimir Kosinsky | Soviet Union | 2:38.1 | |
Key: WR = World record