| Breed | Active | Population | Highest Levelled |
|---|---|---|---|
| Saarloos Wolfdog Group: Drovers | 81% | 18,033 | 99 Highest Retired: 101 |
| Saint Bernard Group: Draught | 75% | 11,645 | 96 Highest Retired: 100 |
| Saluki Group: Sight Hounds | 74% | 23,631 | 106 Highest Retired: 105 |
| Samoyed Group: Draught | 79% | 11,829 | 98 Highest Retired: 105 |
| Schipperke Group: Versatile | 70% | 6,793 | 94 Highest Retired: 99 |
| Scottish Deerhound Group: Sight Hounds | 80% | 10,521 | 107 Highest Retired: 102 |
| Scottish Terrier Group: Terriers | 65% | 6,279 | 109 Highest Retired: 111 |
| Shetland Sheepdog Group: Drovers | 75% | 45,283 | 125 Highest Retired: 123 |
| Shiba Inu Group: Hunting | 75% | 13,866 | 114 Highest Retired: 113 |
| Shih Tzu Group: Companions | 72% | 10,694 | 113 Highest Retired: 109 |
| Shikoku Group: Hunting | 77% | 7,186 | 111 Highest Retired: 103 |
| Siberian Husky Group: Draught | 75% | 51,299 | 130 Highest Retired: 124 |
| Silken Windhound Group: Sight Hounds | 76% | 28,163 | 103 Highest Retired: 103 |
| Silky Terrier Group: Terriers | 81% | 5,451 | 96 Highest Retired: 96 |
| Skye Terrier Group: Terriers | 70% | 7,133 | 106 Highest Retired: 105 |
| Sloughi Group: Sight Hounds | 81% | 10,279 | 105 Highest Retired: 102 |
| Smooth Collie Group: Drovers | 75% | 12,028 | 100 Highest Retired: 106 |
| Smooth Fox Terrier Group: Terriers | 72% | 5,519 | 102 Highest Retired: 103 |
| Soft Coated Wheaten Terrier Group: Terriers | 72% | 5,431 | 118 Highest Retired: 110 |
| Spinone Italiano Group: Pointers/Setters | 79% | 7,452 | 103 Highest Retired: 100 |
| Stabyhoun Group: Pointers/Setters | 78% | 8,481 | 101 Highest Retired: 102 |
| Staffordshire Bull Terrier Group: Bull-Type Terriers | 81% | 12,458 | 104 Highest Retired: 101 |
| Standard Poodle Group: Retrievers | 73% | 33,130 | 101 Highest Retired: 107 |
| Sussex Spaniel Group: Spaniels/Flushers | 77% | 6,597 | 100 Highest Retired: 100 |
| Swedish Vallhund Group: Drovers | 77% | 9,399 | 121 Highest Retired: 121 |