Select: ALL A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| Name | Membership | USCF# | ICA-Exp |
| Saha, Anisha | Scholastic | 30718185 | 2025-05-31 |
| Sahoo, Sheetansu Bhusan | Scholastic | 16668915 | 2025-10-06 |
| Sahoo, Tanirika | Scholastic | 31016967 | 2025-08-07 |
| Salski, Drew | Scholastic | 30319900 | 2024-11-30 |
| Sapkal, Anuradha | Regular | 2026-10-30 | |
| Schillage, Austin | Regular | 13898882 | 2025-10-31 |
| Schmakel, Sam | Honorary | 12887417 | 2030-12-31 |
| Segreto, Thomas | Regular | 12520172 | 2026-08-31 |
| Shah, Aarav T. | Scholastic | 16299855 | 2026-08-03 |
| Shankar, Gauri | Honorary | 12909025 | 2030-12-31 |
| Sheridan, James | Regular | 31488846 | 2025-10-09 |
| Sheridan, Suzanne | Regular | 17093673 | 2025-10-09 |
| Sheridan, Wayra | Scholastic | 16974060 | 2025-10-09 |
| Shetty, Anshul | Scholastic | 15752957 | 2025-04-17 |
| Shrigadi, Aryan | Scholastic | 15491764 | 2025-10-30 |
| Shrigadi, Girish | Regular | 16571252 | 2025-10-30 |
| Shulman, Yury | Honorary | 12741541 | 2030-12-31 |
| Silvestre, Lucas | Scholastic | 30021630 | 2025-04-30 |
| Sinha, Shanu | Regular | 16071488 | 2025-06-08 |
| Smythe, Bill | Century | 10339022 | 2024-12-31 |
| Stevens, Matthew | Patron | 13788934 | 2025-10-31 |
| Stinson, Marcus | Regular | 10241600 | 2025-09-01 |
| Stoltz, Robert | Regular | 11395422 | 2025-07-31 |
| Szpisjak, Steven | Regular | 11464459 | 2025-05-31 |
Memberships expiring on or after: 2024-11-01