| Championship Event Series race | |
 | |
| Location | Belmont Park |
|---|---|
| Race type | Thoroughbred |
| Website | www |
| Race information | |
| Distance | See individual races |
| Surface | Turf, Dirt |
| Track | Left-handed |
| Purse | Varies by race; Between $1,000,000 – $4 million |
The 2005 Breeders' Cup World Championships was the 22nd edition of the premier event of the North American thoroughbred horse racing year. The eight races, all of which were Grade I, took place on October 29 at Belmont Park in Elmont, New York and were telecast by NBC. The Breeders' Cup is generally regarded as the end of the North America racing season, although a few Grade I events take place in later November and December. The results of the races were highly influential in that year's Eclipse Award voting.
The highlight of the event was Saint Liam's victory in the Classic, wrapping up a campaign that earned him Horse of the Year honors.