| Name | Type | Language | Counties |
|---|---|---|---|
| PILAR ELENA COLLAZO | Master | English, Spanish | Clackamas, Hood River, Multnomah, Washington |
| MELINDA ROSE COLLIER | Master | English | Klamath, Lake |
| Andrea Maria Collins | Master | English | Grant, Morrow, Umatilla, Union |
| EMILY SUSAN COLLINS | Standardized | English | All |
| Lori Colvin | Master | English | Crook, Deschutes, Jefferson |
| REBEKAH CONLEY | Standardized | ||
| Michael (Michael) Ames Connor | Master | English | All |
| CLAUDIA CONTRERAS PETERS | Master | English, Spanish | All |
| VELVET COOLEY | Master | English | Clackamas, Multnomah, Tillamook, Washington |
| Chelsea Rene Coots | Master | English | Marion, Polk, Yamhill |
| Jacquelyn Kae Cordero | Community | English | Coos, Curry, Jackson, Josephine, Klamath |
| APRIL K CORIL | Master | English | Clackamas, Marion, Multnomah, Washington |
| Jennifer Michelle Cork | Master | English | Benton, Clatsop, Columbia, Lincoln, Linn, Marion, Multnomah, Polk, Tillamook, Washington, Yamhill |
| Estonia Latavia Cornett | Master | English | Clackamas, Multnomah, Washington |
| MARIA (Mayra) G CORONA | Master | English, Spanish | |
| Lorena Cortes Gonzalez | Standardized | English, Spanish | Morrow, Multnomah, Umatilla |
| LINDA MARIE CRAVEN | Master | English | All |
| DAWN CRAWFORD | Master | English | All |
| Janis Irene Crawford | Specialty Master | English | All |
| RUTH CRAWMER | Community | English | Crook, Deschutes |