| No. | Name | Type | Language | Counties |
|---|---|---|---|---|
| 0 | BRANDY COLEMAN | Master | English | All |
| 3 | PILAR ELENA COLLAZO | Master | English, Spanish | Clackamas, Hood River, Multnomah, Washington |
| 3 | MELINDA ROSE COLLIER | Master | English | Klamath, Lake |
| 0 | Andrea Maria Collins | Master | English | Grant, Morrow, Umatilla, Union |
| 0 | EMILY SUSAN COLLINS | Standardized | English | All |
| 0 | Lori Colvin | Master | English | Crook, Deschutes, Jefferson |
| 0 | DIGNA ALCANTARA COLWELL | Standardized | Douglas | |
| 0 | Mary Isabel Conde-Rivera | Standardized | English, Spanish | Multnomah |
| 0 | JANET JEAN CONDIT-NICHOLAS | Not given | English | Lincoln |
| 0 | CHRISTIE CONNARD | Standardized | English | Linn |
| 0 | Michael (Michael) Ames Connor | Master | English | All |
| 18 | JOANN M. CONTINI | Master | English | All |
| 0 | JOAQUINA CONTRERAS | Standardized | English, Spanish | Gilliam, Hood River, Sherman, Wasco, Wheeler |
| 0 | CLAUDIA CONTRERAS-PETERS | Master | English, Spanish | All |
| 0 | JEANNINE COOK | Not given | English | Linn |
| 0 | MERRILEE COOLEY | Standardized | English | Columbia |
| 0 | VELVET COOLEY | Master | English | Clackamas, Multnomah, Tillamook, Washington |
| 0 | CHRISTOPHER COOPER | Standardized | English, Spanish | Morrow, Umatilla |
| 0 | PATTY COOPER | Standardized | English | Clackamas, Multnomah, Washington, Yamhill |
| 0 | Shannon Shawn Cooper | Standardized | English | Lane |