| Breed | Active | Population | Highest Levelled |
|---|---|---|---|
| Saarloos Wolfdog Group: Drovers | 81% | 18,343 | 100 Highest Retired: 101 |
| Saint Bernard Group: Draught | 73% | 11,847 | 96 Highest Retired: 100 |
| Saluki Group: Sight Hounds | 74% | 24,472 | 106 Highest Retired: 105 |
| Samoyed Group: Draught | 77% | 12,193 | 98 Highest Retired: 105 |
| Schipperke Group: Versatile | 71% | 6,822 | 94 Highest Retired: 99 |
| Scottish Deerhound Group: Sight Hounds | 79% | 10,698 | 107 Highest Retired: 102 |
| Scottish Terrier Group: Terriers | 65% | 6,397 | 109 Highest Retired: 111 |
| Shetland Sheepdog Group: Drovers | 74% | 46,505 | 125 Highest Retired: 123 |
| Shiba Inu Group: Hunting | 75% | 14,126 | 114 Highest Retired: 113 |
| Shih Tzu Group: Companions | 72% | 10,773 | 113 Highest Retired: 109 |
| Shikoku Group: Hunting | 77% | 7,379 | 111 Highest Retired: 103 |
| Siberian Husky Group: Draught | 75% | 52,112 | 130 Highest Retired: 124 |
| Silken Windhound Group: Sight Hounds | 76% | 28,814 | 103 Highest Retired: 103 |
| Silky Terrier Group: Terriers | 81% | 5,506 | 96 Highest Retired: 96 |
| Skye Terrier Group: Terriers | 71% | 7,278 | 106 Highest Retired: 105 |
| Sloughi Group: Sight Hounds | 81% | 10,516 | 105 Highest Retired: 102 |
| Smooth Collie Group: Drovers | 76% | 12,049 | 100 Highest Retired: 106 |
| Smooth Fox Terrier Group: Terriers | 72% | 5,532 | 102 Highest Retired: 103 |
| Soft Coated Wheaten Terrier Group: Terriers | 73% | 5,600 | 118 Highest Retired: 110 |
| Spinone Italiano Group: Pointers/Setters | 80% | 7,427 | 103 Highest Retired: 100 |
| Stabyhoun Group: Pointers/Setters | 77% | 8,741 | 101 Highest Retired: 102 |
| Staffordshire Bull Terrier Group: Bull-Type Terriers | 80% | 12,473 | 104 Highest Retired: 102 |
| Standard Poodle Group: Retrievers | 73% | 33,539 | 101 Highest Retired: 107 |
| Sussex Spaniel Group: Spaniels/Flushers | 79% | 6,667 | 100 Highest Retired: 100 |
| Swedish Vallhund Group: Drovers | 77% | 9,543 | 121 Highest Retired: 121 |