| Name | Type | Language | Counties |
|---|---|---|---|
| KRISTIN RENE CHURCH | Standardized | English | |
| MARGIE A. CICERRELLA | Standardized | English | Jackson |
| JAIME CIECALONE | Community | English | Lane |
| LINDA CINNAMOND | Not given | English | Multnomah |
| Teresa Ann Cisneros | Community | English, Spanish | Marion, Polk, Yamhill |
| AMY MCADAMS CLARK | Standardized | English | Multnomah |
| CLAIRE ELAINE CLARK | Community | English | Grant, Morrow, Umatilla, Union, Wallowa |
| SIOBHAN CLARK | Community | English | Clackamas, Multnomah, Washington |
| Stacia Ann Clark | Master | English, Spanish | All |
| TAMARA CLARK | Master | English | Lane, Linn, Multnomah |
| DEZIRE CONTENT CLARKE MEINDERSEE | Master | English | All |
| MYRA MIHELICH CLASSEN | Master | English | Benton, Clackamas, Columbia, Hood River, Lane, Lincoln, Linn, Marion, Multnomah, Polk, Tillamook, Washington, Yamhill |
| MOLLY CLEMENT | Master | English | Jackson, Josephine |
| JUDY CLIFFORD | Standardized | English | Washington |
| Kendra Janine Coates | Master | English | All |
| DEBORAH P. COEHLO | Master | English | All |
| ANDREA COFFEE | Master | English | Lane |
| CHRISTINA COFFEY | Standardized | Benton, Linn, Marion, Polk, Yamhill | |
| ELISABETH MENZEL COHEN | Standardized | English | Coos, Curry |
| TONYA COKER | Master | English | All |
| NELL COLBURN | Standardized | English | Multnomah |
| 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 |
| 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 |
| TONYA LYNN CORDERO | Standardized | English | All |
| APRIL K CORIL | Master | English | Clackamas, Marion, Multnomah, Washington |