The 2005 Baseball World Cup (BWC) was the 36th international Men's amateur baseball tournament. The tournament was sanctioned by the International Baseball Federation, which titled it the Amateur World Series from the 1938 tournament through the 1986 AWS. The tournament was held, for the second time, in the Netherlands, from September 2 to 17. Cuba defeated South Korea in the final, winning its 26th title.
There were 18 participating countries, split into two groups, with the first four of each group qualifying for the finals. Games were played in the Dutch cities of Rotterdam, Haarlem, Almere, Amsterdam and Eindhoven.
The next three competitions were also held as the BWC tournament, which was replaced in 2015 by the quadrennial WBSC Premier12.
First round
Playoffs
| Quarter-finals | Semi-finals | Final | ||||||||
 Cuba | 11 | |||||||||
 United States | 3 | |||||||||
| Cuba | 15 | |||||||||
 Panama | 2 | |||||||||
| Panama | 2 | |||||||||
 Nicaragua | 1 | |||||||||
| Cuba | 3 | |||||||||
 South Korea | 0 | |||||||||
| South Korea | 5 | |||||||||
 Japan | 1 | |||||||||
| South Korea | 7 | |||||||||
 Netherlands | 0 | Third place | ||||||||
| Netherlands | 10 | |||||||||
 Puerto Rico | 0 7 inn. | |||||||||
| Panama | 7 | |||||||||
| Netherlands | 6 | |||||||||
| 5th–8th place | Fifth place | |||||
| Japan | 5 | |||||
| Puerto Rico | 0 | |||||
| Japan | 8 | |||||
| Nicaragua | 1 | |||||
| Nicaragua | 9 | |||||
| United States | 0 | |||||
| Seventh place | ||||||
| United States | 11 | |||||
| Puerto Rico | 3 | |||||