| No. | Name | Type | Language | Counties |
|---|---|---|---|---|
| 0 | Holly Victoria Klein | Master | English | All |
| 0 | JUDY KLING | Not given | English | Washington |
| 0 | MCKENZIE BLUE KLUG | Standardized | English | Douglas, Jackson, Josephine, Lane |
| 0 | JENNIFER KNAPP BEUDERT | Standardized | English | Linn |
| 0 | Katherine Jean Kneupper | Standardized | English | Clackamas, Columbia, Hood River, Multnomah, Washington |
| 0 | CYPRESS KNIGHT | English | Hood River | |
| 0 | LEAH RUTH KNOKE | Community | English | Crook, Deschutes, Jefferson |
| 0 | SAMANTHA KNOUSE | Master | English | All |
| 0 | Carol Knowles | Not given | English | Deschutes |
| 0 | IRINA GENNADYEVNA KNOWLES | Standardized | All | |
| 11 | Lena Colleen Ko | Master | English | All |
| 1 | Angela C Koehler | Master | English | Clackamas |
| 0 | BRENDA ELIZABETH KOEHLER | Master | English | Clackamas, Multnomah |
| 14 | PATSY KOHOUT | Master | English | All |
| 0 | LISA KOPETSKI | Not given | English | Umatilla |
| 6 | ERIN KOST | Master | English | All |
| 0 | Heather Koukel | Community | English | Washington |
| 0 | KAREN JOAN KRAEMER | Community | English | Clackamas, Clatsop, Hood River, Multnomah, Washington |
| 1 | SUSAN MARIE KRAEMER | Community | English | All |
| 0 | Susan Dian Kramer | Community | English | Lincoln, Linn, Marion, Polk, Tillamook, Yamhill |