| Name | Type | Language | Counties |
|---|---|---|---|
| DENNIS EUGENE SIBILIA-YOUNG | Community | English, Spanish | Benton, Clackamas, Clatsop, Coos, Deschutes, Douglas, Jefferson, Klamath, Lane, Lincoln, Linn |
| KATHY GALE SIEMER | Standardized | English | Coos, Curry |
| HEIDA SIGURDARDOTTIR | Community | English | Lane |
| Michele Silence | Community | English | All |
| FLOR DE MARIA SILVA GUTIERREZ | Master | English, Spanish | Washington |
| Merry Lynn Silver | Not given | English | Marion |
| Candy Denise Silvers | Not given | English | Clackamas |
| Heather Lynn Simmons | Master | English | All |
| Evghenia Sincariuc | Master | English, Russian, Other | All |
| LINDA SINCLAIR | Standardized | English | Washington |
| Linda Sinclair | Master | English | Lane, Linn, Marion, Polk, Washington |
| AMBER LILA SINGH | Master | English | Douglas, Klamath, Lake |
| NICOLE ELAINE SINGLETON | Community | English | All |
| DEBORAH MARGARET SIPE | Standardized | English | Tillamook |
| Cherie C Skillings | Master | English | Crook, Deschutes, Jefferson, Lane |
| PATRICIA GALE SKINNER | Standardized | English | Clatsop |
| REBECCA ELAINE SKYLES | Community | English | Multnomah, Washington |
| JENNIFER ANN SLATER | Standardized | English | Douglas, Lane |
| MISTY MICHELLE SLATER | Standardized | English | Baker, Clackamas, Hood River, Lane, Multnomah, Umatilla, Union, Wallowa, Washington, Yamhill |
| Zoya Edwardovna Slatsky | Standardized | Douglas, Lane |