| Name | Type | Language | Counties |
|---|---|---|---|
| NATALIE CHRISTINE LO | Master | English | Coos |
| ROSIE LOCATI | Not given | English | Marion |
| BRUCE LOFLAND | Standardized | English | Columbia |
| MARGO LORETTA LOGAN | Community | English | Multnomah |
| Jamie Lea Loiland | Standardized | English | Baker, Gilliam, Grant, Hood River, Malheur, Morrow, Umatilla, Union, Wallowa, Wasco, Wheeler |
| MARY ANN LOILAND | Standardized | English | Morrow, Umatilla |
| Erin Michelle Lolich | Master | English | All |
| AMY ALISA LOMANTO | Master | English | All |
| AMBER DAWN LOMASCOLA | Master | English | All |
| IRENE M LONDRAVILLE | Not given | English | Washington |
| KIMBERLY CRISS LONG | Master | English | Clackamas |
| Kristen (Kris) D Long | Master | English | Washington |
| Miranda Kaye Long | Master | English | All |
| CATHERINE JANINE LOOMIS | Not given | English | Lane |
| SCHLEE CRYSTINA LOOMIS PULIDO | Community | English | Clackamas, Hood River, Multnomah, Sherman, Wasco |
| RITA LOOP | Master | English, Spanish | Lane, Linn |
| RYAN LOOSLI | Standardized | English | Douglas |
| ELIZABETH LOPEZ | Standardized | Washington | |
| Dina Elvira Lopez Bautista | Standardized | English | Washington |
| ROBYN ANN LOPEZ MELTON | Master | English, Spanish | All |