| No. | Name | Type | Language | Counties |
|---|---|---|---|---|
| 0 | Carole A Mace-Edwards-Jones | Master | English | Morrow, Umatilla, Union |
| 0 | Margaret G MacGillivray-Hossfield | Master | English | Clackamas, Multnomah, Washington |
| 0 | BETTY ANN MACTAVISH | Standardized | English | Morrow, Umatilla |
| 0 | TONYA LATTANZI MADRIGAL | Master | English, Spanish | Clackamas |
| 3 | Irma Beatriz Madsen | Master | Spanish | Multnomah |
| 68 | AOIFE ROSE MAGEE | Master | English | All |
| 0 | ELIZABETH MAY MAIA | Standardized | English, Spanish | Clackamas, Multnomah, Washington |
| 0 | SKIPPER MAINE | Standardized | English | Clackamas, Clatsop, Columbia, Linn, Marion, Multnomah, Tillamook, Washington, Yamhill |
| 2 | DAWN ROXANN (ROXANN) MALMBERG | Master | English | Morrow, Umatilla |
| 5 | SHANNON MALUSEVIC | Master | English | Multnomah, Washington |
| 0 | EPHREM MAMO | Master | English, Other | Clackamas, Multnomah, Washington |
| 0 | AVA P MANASCO | Master | English, Other | All |
| 0 | HILARY MANKOFSKY | Community | English | All |
| 0 | Alexis Nicole Mann | Community | English | Douglas, Klamath, Lake |
| 0 | SUZANNE MANN-HEINZ | Standardized | English | Douglas |
| 0 | CHRISTEN MARIE MANSUETTI | Community | English | Jackson, Josephine |
| 0 | Laura Maravilla | Master | English, Spanish | All |
| 1 | Sarah Marble | Master | English, Spanish | All |
| 0 | TALIA MARCUCCI OSITIS | Master | English | Clackamas, Multnomah, Washington |
| 0 | Jessica R. Marie | Standardized | English | Marion, Polk, Yamhill |
| 0 | JESSICA MARIE | Community | English | Lane |
| 0 | JENNA GENEVE MARILUCH | Standardized | English | Klamath |
| 279 | Tammy S Marino | Master | English | All |
| 1 | Ahmed Marjan | Specialty Master | English | All |
| 0 | REGINA MARKS | Standardized | English | Gilliam, Hood River, Morrow, Umatilla |
| 5 | Beatriz Marron-Molina | Master | English, Spanish | All |
| 0 | AUTUM BREA MARSH | Community | English | Clatsop, Columbia, Tillamook |
| 0 | BRENDA FAYE MARSHALL | Not given | English | Multnomah |
| 0 | Sandra Marsili | Standardized | English | Clackamas, Multnomah, Washington |
| 0 | Nicole Martin | Community | English | Douglas |
| 0 | RHIANNON MARTIN | Master | English | Clackamas, Multnomah |
| 0 | TAMI MARIE MARTIN | Standardized | English | Multnomah, Washington |
| 0 | TERESA LYNETTE MARTIN | Master | English | Jefferson |
| 0 | DONNA MARTINEZ | Standardized | English | Washington |
| 1 | FERNANDO MARTINEZ | Master | English, Spanish | All |
| 1 | KATHRYN MARTINEZ | Community | English | All |
| 4 | THERESA MARTINEZ | Master | English | All |
| 0 | Victoria Marie Martinez | Master | English | All |
| 0 | DAWN K. MARTINI | Master | English | All |
| 0 | COLLEEN MARTINSON | Not given | English | Deschutes |
| 0 | JUDY LEE MARVAL | Standardized | English | Josephine |
| 0 | KATHLEEN MASEK | Standardized | English | Hood River, Wasco |
| 0 | BRENDA MASSIE | Master | English | Gilliam, Hood River, Sherman, Wasco, Wheeler |
| 0 | SHAWN BRUMBACH MASSINGALE | Master | English | Douglas |
| 0 | BETTY MASSONI | Not given | English | Benton |
| 0 | VICTORIA Ortencia MATA LOPEZ | Standardized | English | Tillamook |
| 0 | LOREEN MATHIAS | Not given | English | |
| 1 | LISA DARLENE MATHIS | Master | English | Crook, Deschutes, Jefferson |
| 1 | VELDA MATSDORF | Community | English | Benton, Clackamas, Douglas, Jackson, Josephine, Lane, Linn, Marion, Multnomah, Polk, Washington, Yamhill |
| 0 | SUSANNE (Sue) MARIE MATTERS | Standardized | English | Crook, Deschutes, Jefferson |