| Sabari,
Harper - Poulsbo, WA |
| Sadang,
Joli Anne - Ewa Beach, HI |
| Saito,
Saki - Zushi, JAPAN |
| Salazar,
Aaron - Kent, WA |
| Salazar,
Jamilah - Bremerton, WA |
| Salim,
Ruweyda - Seattle, WA |
| Salvador,
Leannah Loisse - Des Moines, WA |
| Sams,
Logan - Seattle, WA |
| Samuel,
Amarachi - Surrey, BC |
| Sandate,
Brienna - Port Orchard, WA |
| Sandberg,
Henry - Spokane, WA |
| Santiago G,
Selina - Burlington, WA |
| Santillan Felix,
Mariela - Burien, WA |
| Santos Alvarado,
Dalia - Fairview, OR |
| Sapier,
Alison - Anacortes, WA |
| Sapkota,
Arjun - Chitwan, NEPAL |
| Saunders,
Cameron - Blaine, WA |
| Saxon,
Mikel - Kirkland, WA |
| Scalera,
Isabella - Tacoma, WA |
| Scarry,
Julia - Seattle, WA |
| Schakel,
Molly - Stanwood, 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 |
| Schudel,
Jacob - APO, AE |
| Schumann,
Michael - Camas, WA |
| Schumer,
Malia - Seattle, WA |
| Schwartz,
Ethan - Medical Lake, WA |
| Senderson,
Layla - Vancouver, WA |
| Sevilla,
Allison Aeris - Tukwila, WA |
| Shaw,
Keira - Kent, WA |
| Sheikh,
Hanna - Seattle, WA |
| Sheridan,
Shannon - Seattle, WA |
| Shimabayashi,
Midori - Toyama, JAPAN |
| Shoemaker,
Elle - Olympia, WA |
| Short,
Erica - Carpinteria, CA |
| Shuparskaya,
Elizabeth - Federal Way, WA |
| Sica,
Caleb - Covington, WA |
| Sidibe,
Kadidiatou - Seattle, WA |
| Sigheartau,
Andrea - Redmond, WA |
| Simon,
Sarah - Renton, WA |
| Singh,
Kedar - Janakpurdham, NEPAL |
| Skinner,
Bailey - Anchorage, AK |
| Smith,
Adeline - Kenai, AK |
| Smith,
Ella - Silverdale, WA |
| Snedeker,
Lauren - Washougal, WA |
| Snow,
Lwin Lwin - Yangon, MYANMAR |
| Somers,
Aubrey - Snohomish, WA |
| Soto,
Christopher - Mount Vernon, WA |
| Soto Serna,
Melissa - Federal Way, WA |
| Speakman,
Lily - Denver, CO |
| Stargell,
Anna-Celeste - Maple Falls, WA |
| Stay,
Dylan - Bellevue, WA |
| Stead,
Clara - El Dorado Hills, CA |
| Stevenson,
Matthew - Renton, WA |
| Stiegelmar,
Amiah - Pinon Hills, CA |
| Stine,
Bailey - Pacific, WA |
| Stringer,
Kaela - Portland, OR |
| Sueyoshi,
Mia - Kaneohe, HI |
| Suherman,
Kayla - Bothell, WA |
| Sutherland,
Aengus - Lake Oswego, OR |
| Suzuki,
Ai - Palo Alto, CA |