| Sadlier,
Emry - Seattle, WA |
| Saito,
Konoka - Nagoya, JAPAN |
| Saito,
Saki - Zushi, JAPAN |
| Salazar,
Aaron - Kent, WA |
| Salimova,
Sabina - Seattle, WA |
| Salzman,
Hailey - University Place, WA |
| Sams,
Logan - Seattle, WA |
| Samuel,
Amarachi - Surrey, BC |
| Sandate,
Brienna - Port Orchard, WA |
| Sandberg,
Henry - Spokane, WA |
| Sandoval,
Alexia - Wenatchee, WA |
| Sandoval,
Jessica - Yakima, WA |
| Sapier,
Alison - Anacortes, WA |
| Sapkota,
Arjun - Chitwan, NEPAL |
| Sarquilla,
Lizzie - Seattle, WA |
| Saunders,
Cameron - Blaine, WA |
| Saxon,
Mikel - Kirkland, WA |
| Scarry,
Julia - Seattle, WA |
| Schaefer,
Luciana - Spokane, WA |
| Scharfenberg,
Eva - Bothell, WA |
| Schau,
Anika - Normandy Park, WA |
| Schemper,
Mollie - Sheldon, IA |
| Schoenerstedt,
Nikias - Tribuswinkel, AUSTRIA |
| Schoennauer,
Landry - San Jose, CA |
| Schoepflin,
Jade - Lynnwood, WA |
| Scholz,
Gideon - Stanwood, WA |
| Schumer,
Malia - Seattle, WA |
| Schwartz,
Ethan - Medical Lake, WA |
| Segall,
Anika Elyse - Seattle, WA |
| Sessions,
Ella - Spokane, WA |
| Sevilla,
Allison Aeris - Tukwila, WA |
| Shahzahan,
Shadman - Vancouver, WA |
| Shaw,
Keira - Kent, WA |
| Sheridan,
Shannon - Seattle, WA |
| Shimabayashi,
Midori - Toyama, JAPAN |
| Sigheartau,
Andrea - Redmond, WA |
| Silva,
Malia Ana - Cathlamet, WA |
| Singh,
Gurpreet - Hoshiarpur, INDIA |
| Singh,
Kedar - Janakpurdham, NEPAL |
| Skinner,
Bailey - Anchorage, AK |
| Smith,
Destiny - Grand Prairie, TX |
| Snow,
Lwin Lwin - Yangon, MYANMAR |
| Somers,
Aubrey - Snohomish, WA |
| Sonntag,
Isaiah - Tacoma, WA |
| Sosa-Bonilla,
Valerie - Everett, WA |
| Soto Serna,
Melissa - Federal Way, WA |
| Stamatis,
Sophia - Phoenix, AZ |
| Stargell,
Anna-Celeste - Maple Falls, WA |
| Stead,
Clara - El Dorado Hills, CA |
| Stevenson,
Matthew - Renton, WA |
| Stirret,
Nathaniel - Brier, WA |
| Stoll,
Emmy - Broomfield, CO |
| Stringer,
Kaela - Portland, OR |
| Sueyoshi,
Mia - Kaneohe, HI |
| Suherman,
Kayla - Bothell, WA |
| Suzuki,
Ai - Palo Alto, CA |