Medal table
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 |  United States (USA) | 2 | 1 | 2 | 5 |
| 2 |  Soviet Union (URS) | 2 | 0 | 1 | 3 |
| 3 |  East Germany (GDR) | 0 | 3 | 0 | 3 |
| 4 |  Italy (ITA) | 0 | 0 | 1 | 1 |
| Totals (4 entries) | 4 | 4 | 4 | 12 | |
| 1978 FINA World Championships | ||
|---|---|---|
| Diving | ||
| Individual | ||
| 3 m | men | women |
| 10 m | men | women |
| Swimming | ||
| Freestyle | ||
| 100 m | men | women |
| 200 m | men | women |
| 400 m | men | women |
| 800 m | women | |
| 1500 m | men | |
| Backstroke | ||
| 100 m | men | women |
| 200 m | men | women |
| Breaststroke | ||
| 100 m | men | women |
| 200 m | men | women |
| Butterfly | ||
| 100 m | men | women |
| 200 m | men | women |
| Individual medley | ||
| 200 m | men | women |
| 400 m | men | women |
| Freestyle relay | ||
| 4×100 m | men | women |
| 4×200 m | men | |
| Medley relay | ||
| 4×100 m | men | women |
| Synchronised swimming | ||
| Solo | women | |
| Duet | women | |
| Team | women | |
| Water polo | ||
| Tournament | men | |
These are the results of the diving competition at the 1978 World Aquatics Championships, which took place in West Berlin.
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 | United States (USA) | 2 | 1 | 2 | 5 |
| 2 | Soviet Union (URS) | 2 | 0 | 1 | 3 |
| 3 | East Germany (GDR) | 0 | 3 | 0 | 3 |
| 4 | Italy (ITA) | 0 | 0 | 1 | 1 |
| Totals (4 entries) | 4 | 4 | 4 | 12 | |
| Event | Gold | Silver | Bronze |
| 3 m springboard |
 Phil Boggs (USA)913.95 |
Falk Hoffmann (GDR) 873.33 |
Giorgio Cagnotto (ITA) 845.51 |
| 10 m platform |
Greg Louganis (USA) 844.11 |
Falk Hoffmann (GDR) 836.76 |
Vladimir Aleynik (URS) 813.62 |
| Event | Gold | Silver | Bronze |
| 3 m springboard |
Irina Kalinina (URS) 691.43 |
Cynthia Potter (USA) 643.22 |
Jennifer Chandler (USA) 637.41 |
| 10 m platform |
Irina Kalinina (URS) 412.71 |
Martina Jäschke (GDR) 384.09 |
Melissa Briley (USA) 364.74 |