2015 World's Best Racehorse Rankings
The 2015 World's Best Racehorse Rankings, sponsored by Longines was the 2015 edition of the World's Best Racehorse Rankings. It was an assessment of Thoroughbred racehorses issued by the International Federation of Horseracing Authorities in January 2016. It included horses aged three or older which competed in flat races during 2015. It was open to all horses irrespective of where they raced or were trained.
Rankings for 2015
- For a detailed guide to this table, [|see below].
| Rank | Rating | Horse | Age | Sex | Trained | Pos. | Race | Surface | Dist. | Cat. |
| 1 | 134 | American Pharoah | 3 | C | USA | 1st | Breeders' Cup Classic | Dirt | 2,000 | I |
| 2 | 130 | Golden Horn | 3 | C | GB | 1st | Epsom Derby Eclipse Stakes | Turf | 2,400 2,000 | L I |
| 3 | 126 | Shared Belief | 4 | G | USA | 1st | Santa Anita Handicap | Dirt | 2,000 | I |
| 3 | 126 | Treve | 5 | M | FR | 1st | Prix Vermeille | Turf | 2,400 | L |
| 5 | 125 | Able Friend | 6 | G | HK | 1st | Queen's Silver Jubilee Cup Premier Bowl | Turf | 1,400 1,200 | M S |
| 5 | 125 | Solow | 5 | G | FR | 1st | Dubai Turf | Turf | 1,800 | M |
| 7 | 124 | Order of St George | 3 | C | IRE | 1st | Irish St Leger | Turf | 2,800 | E |
| 8 | 123 | A Shin Hikari | 4 | C | JPN | 1st | Hong Kong Cup | Turf | 2,000 | I |
| 8 | 123 | Beholder | 5 | M | USA | 1st | Pacific Classic | Dirt | 2,000 | I |
| 8 | 123 | Chautauqua | 5 | G | AUS | 1st | Manikato Stakes | Turf | 1,200 | S |
| 8 | 123 | Designs On Rome | 5 | G | HK | 1st | Centenary Vase | Turf | 1,800 | M |
| 8 | 123 | Dortmund | 3 | C | USA | 1st | Native Diver Handicap | Dirt | 1,800 | M |
| 8 | 123 | Fascinating Rock | 4 | C | IRE | 1st | Champion Stakes | Turf | 2,000 | I |
| 8 | 123 | Firing Line | 3 | C | USA | 2nd | Kentucky Derby | Dirt | 2,000 | I |
| 8 | 123 | Flintshire | 5 | H | FR | 2nd | Prix de l'Arc de Triomphe | Turf | 2,400 | L |
| 8 | 123 | Free Eagle | 4 | C | IRE | 1st | Prince of Wales's Stakes | Turf | 2,000 | I |
| 8 | 123 | Honor Code | 4 | C | USA | 1st | Whitney Stakes | Dirt | 1,800 | M |
| 8 | 123 | Jack Hobbs | 3 | C | GB | 1st | Irish Derby | Turf | 2,400 | L |
| 8 | 123 | Lankan Rupee | 6 | G | AUS | 1st | Black Caviar Lightning | Turf | 1,000 | S |
| 8 | 123 | Muhaarar | 3 | C | GB | 1st | British Champions Sprint Stakes | Turf | 1,200 | S |
| 8 | 123 | Winx | 4 | F | AUS | 1st | Cox Plate | Turf | 2,040 | I |
| 22 | 122 | Gleneagles | 3 | C | GB | 1st | 2000 Guineas | Turf | 1,600 | M |
| 22 | 122 | Keen Ice | 3 | C | USA | 1st | Travers Stakes | Dirt | 2,000 | I |
| 22 | 122 | Liam's Map | 4 | C | USA | 1st | Breeders' Cup Dirt Mile | Dirt | 1,600 | M |
| 22 | 122 | New Bay | 3 | C | FR | 3rd | Prix de l'Arc de Triomphe | Turf | 2,400 | L |
| 22 | 122 | The Grey Gatsby | 4 | C | GB | 2nd | Eclipse Stakes | Turf | 2,000 | I |
| 27 | 121 | Al Kazeem | 7 | H | GB | 1st | Tattersalls Gold Cup | Turf | 2,000 | I |
| 27 | 121 | Blazing Speed | 6 | G | HK | 1st | Queen Elizabeth II Cup | Turf | 2,000 | I |
| 27 | 121 | Brazen Beau | 4 | C | AUS | 1st | Newmarket Handicap | Turf | 1,200 | S |
| 27 | 121 | California Chrome | 4 | C | USA | 2nd | San Antonio Handicap, Dubai World Cup | Dirt | 1,800 | M |
| 27 | 121 | Captain of All | 5 | H | SAF | 1st | Mercury Sprint | Turf | 1,200 | S |
| 27 | 121 | Cirrus des Aigles | 9 | G | FR | 1st | Prix Ganay | Turf | 2,100 | I |
| 27 | 121 | Duramente | 3 | C | JPN | 1st | Tokyo Yushun | Turf | 2,400 | L |
| 27 | 121 | Highland Reel | 3 | C | IRE | 1st | Hong Kong Vase | Turf | 2,400 | L |
| 27 | 121 | Lovely Day | 5 | H | JPN | 1st | Kyoto Daishoten | Turf | 2,400 | L |
| 27 | 121 | Make Believe | 3 | C | FR | 1st | Prix de la Foret | Turf | 1,400 | M |
| 27 | 121 | Maurice | 4 | C | JPN | 1st | Hong Kong Mile | Turf | 1,600 | M |
| 27 | 121 | Mongolian Khan | 4 | C | NZ | 1st | Caulfield Cup | Turf | 2,400 | L |
| 27 | 121 | Postponed | 4 | C | GB | 1st | King George VI & Queen Elizabeth Stakes | Turf | 2,400 | L |
| 27 | 121 | Prince Bishop | 8 | G | UAE | 1st | Dubai World Cup | Dirt | 2,000 | I |
| 27 | 121 | Runhappy | 3 | C | USA | 1st | Breeders' Cup Sprint | Dirt | 1,200 | S |
| 42 | 120 | Criterion | 5 | H | AUS | 1st 3rd | Queen Elizabeth Stakes Melbourne Cup | Turf | 2000 3200 | I E |
| 42 | 120 | Dolniya | 4 | F | FR | 1st | Dubai Sheema Classic | Turf | 2410 | L |
| 42 | 120 | Eagle Top | 4 | C | GB | 2nd | King George VI & Queen Elizabeth Stakes | Turf | 2400 | L |
| 42 | 120 | Effinex | 4 | C | USA | 2nd | Breeders' Cup Classic | Dirt | 2000 | I |
| 42 | 120 | Erupt | 3 | C | FR | 1st | Grand Prix de Paris | Turf | 2400 | L |
| 42 | 120 | Found | 3 | F | IRE | 1st | Breeders' Cup Turf | Turf | 2400 | L |
| 42 | 120 | Frosted | 3 | C | USA | 4th 2nd 1st | Kentucky Derby Belmont Stakes Pennsylvania Derby | Dirt | 2000 2400 1800 | I L M |
| 42 | 120 | Gold-Fun | 6 | G | HK | 1st | Jockey Club Sprint | Turf | 1200 | S |
| 42 | 120 | Gold Ship | 6 | H | JPN | 1st | Hanshin Daishoten | Turf | 3000 | E |
| 42 | 120 | Hi Happy | 3 | C | ARG | 1st | Gran Premio Carlos Pellegrini | Turf | 2400 | L |
| 42 | 120 | Mecca's Angel | 4 | F | GB | 1st | Nunthorpe Stakes | Turf | 1000 | S |
| 42 | 120 | Military Attack | 7 | G | HK | 3rd | Sha Tin Trophy | Turf | 1600 | M |
| 42 | 120 | Private Zone | 6 | G | USA | 1st | Forego Stakes | Dirt | 1400 | S |
| 42 | 120 | Snow Sky | 4 | C | GB | 1st | Hardwicke Stakes | Turf | 2400 | L |
| 42 | 120 | Tepin | 4 | F | USA | 1st | Breeders' Cup Mile | Turf | 1600 | M |
| 42 | 120 | Tonalist | 4 | C | USA | 1st | Jockey Club Gold Cup | Dirt | 2000 | I |
| 42 | 120 | Vazirabad | 3 | G | FR | 1st | Prix Royal Oak | Turf | 3100 | E |