| No. | Name | Type | Language | Counties |
|---|---|---|---|---|
| 1 | ROBIN Lynn LLOYD | Master | English | Clackamas, Multnomah, Washington |
| 9 | NATALIE CHRISTINE LO | Master | English | Coos, Curry |
| 0 | ROSIE LOCATI | Not given | English | Marion |
| 0 | BRUCE LOFLAND | Standardized | English | Columbia |
| 0 | MARGO LORETTA LOGAN | Community | English | Multnomah |
| 0 | Jamie Lea Loiland | Standardized | English | Baker, Gilliam, Grant, Hood River, Malheur, Morrow, Umatilla, Union, Wallowa, Wasco, Wheeler |
| 0 | MARY ANN LOILAND | Standardized | English | Morrow, Umatilla |
| 0 | Erin Michelle Lolich | Master | English | All |
| 45 | AMY ALISA LOMANTO | Master | English | All |
| 1 | Amber Dawn Lomascola | Master | English | All |
| 0 | IRENE M LONDRAVILLE | Not given | English | Washington |
| 0 | KIMBERLY CRISS LONG | Master | English | Clackamas |
| 1 | Kristen (Kris) D Long | Master | English | Washington |
| 0 | Miranda Kaye Long | Master | English | All |
| 0 | CATHERINE JANINE LOOMIS | Not given | English | Lane |
| 0 | SCHLEE CRYSTINA LOOMIS PULIDO | Community | English | Clackamas, Hood River, Multnomah, Sherman, Wasco |
| 1 | RITA LOOP | Master | English, Spanish | Lane, Linn |
| 0 | RYAN LOOSLI | Standardized | English | Douglas |
| 0 | ELIZABETH LOPEZ | Standardized | Washington | |
| 0 | Dina Elvira Lopez Bautista | Standardized | English | Washington |