| Name | Type | Language | Counties |
|---|---|---|---|
| Anna Marin Cole | Standardized | English | Coos, Curry |
| SHARON JOYCE COLE | Standardized | English | Tillamook |
| BRANDY COLEMAN | Master | English | All |
| 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 |
| 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 |