| Name | Type | Language | Counties |
|---|---|---|---|
| Lori Colvin | Master | English | Crook, Deschutes, Jefferson |
| DIGNA ALCANTARA COLWELL | Standardized | Douglas | |
| Mary Isabel Conde-Rivera | Standardized | English, Spanish | Multnomah |
| JANET JEAN CONDIT-NICHOLAS | Not given | English | Lincoln |
| REBEKAH CONLEY | Standardized | ||
| CHRISTIE CONNARD | Standardized | English | Linn |
| Michael (Michael) Ames Connor | Master | English | All |
| JOANN M. CONTINI | Master | English | All |
| JOAQUINA CONTRERAS | Standardized | English, Spanish | Gilliam, Hood River, Sherman, Wasco, Wheeler |
| CLAUDIA CONTRERAS PETERS | Master | English, Spanish | All |
| JEANNINE COOK | Not given | English | Linn |
| MERRILEE COOLEY | Standardized | English | Columbia |
| VELVET COOLEY | Master | English | Clackamas, Multnomah, Tillamook, Washington |
| CHRISTOPHER COOPER | Standardized | English, Spanish | Morrow, Umatilla |
| PATTY COOPER | Standardized | English | Clackamas, Multnomah, Washington, Yamhill |
| Shannon Shawn Cooper | Standardized | English | Lane |
| Chelsea Rene Coots | Master | English | Marion, Polk, Yamhill |
| Margaret Hemphill Copeland | Standardized | Spanish | Jackson, Josephine |
| Jacquelyn Kae Cordero | Community | English | Coos, Curry, Jackson, Josephine, Klamath |
| JESSICA MARIE CORDERO | Community | English | Coos, Curry, Jackson, Josephine |