| Name | Type | Language | Counties |
|---|---|---|---|
| DONELL L. ARCHER | Standardized | English | All |
| JORJIE PACIFIC ARDEN | Community | English | Benton, Douglas, Lane, Linn |
| BARBARA LYNN ARENA-CRANDALL | Master | English | All |
| JESSICA ARENDT | Master | English | Clackamas, Multnomah, Washington |
| JESS ARMAS | Standardized | English | Marion |
| JAN ARMSTRONG | Standardized | English | Lane |
| KAREN ANN ARMSTRONG | Standardized | English | Marion |
| SUSAN GAIL ARMSTRONG | Standardized | English | Douglas, Lane, Marion |
| SUE ARNDT | Standardized | English | Marion, Polk |
| Lynn B Arnold | Specialty Master | English | All |
| Renea Arnold | Master | English | All |
| ROXANNE ARNOT | Not given | English | Curry |
| Jory Janet Aronson | Master | English | All |
| MONA ARRITOLA | Not given | English | Union |
| ZHULMA ZORAIDA ARROBO | Master | English, Spanish | All |
| MARGARITA (Magie) BIBIANA ARROYO | Master | English, Spanish | All |
| Antonio Arroyo-Rojas | Standardized | English, Spanish | Clackamas, Multnomah |
| OLGA ARSHILOVICH | Master | English, Russian | Marion, Polk, Yamhill |
| BIANELA FABIOLA ARTETA PEREZ | Master | English, Spanish | All |
| ALICIA DAWNSTAR ASHBY | Standardized | English | Clackamas, Multnomah, Washington |