| No. | Name | Type | Language | Counties |
|---|---|---|---|---|
| 0 | TONYA COKER | Master | English | All |
| 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, Klamath, Lake |
| 0 | Michael (Michael) Ames Connor | Master | English | All |
| 0 | Claudia Contreras-Peters | Master | English, Spanish | Clackamas, Multnomah, Washington |
| 0 | VELVET COOLEY | Master | English | Clackamas, Multnomah, Tillamook, Washington |
| 1 | Chelsea Rene Coots | Master | English | Marion, Polk, Yamhill |
| 0 | Jacquelyn Kae Cordero | Community | English | Coos, Curry, Jackson, Josephine, Klamath |
| 0 | APRIL K CORIL | Master | English | Clackamas, Marion, Multnomah, Washington |
| 7 | Jennifer Michelle Cork | Master | English | Benton, Clatsop, Columbia, Lincoln, Linn, Marion, Multnomah, Polk, Tillamook, Washington, Yamhill |
| 1 | Estonia Latavia Cornett | Master | English | Clackamas, Multnomah, Washington |
| 0 | Lorena Cortes Gonzalez | Standardized | English, Spanish | Morrow, Umatilla |
| 0 | LINDA MARIE CRAVEN | Master | English | Clackamas, Lincoln, Marion, Polk, Yamhill |
| 0 | DAWN CRAWFORD | Master | English | All |
| 0 | Janis Irene Crawford | Specialty Master | English | All |
| 0 | RUTH CRAWMER | Community | English | Crook, Deschutes |