| Name | Title | Circuit | County | Rate this Judge | Rating | # of Ratings |
| Hon. Matthew Maciarello | Circuit Judge | 1st Circuit | Wicomico |  | | 0 |
| Hon. Kevin Mahoney | Circuit Judge | 3rd Circuit | Harford | | | 1 |
| Hon. Edward Malloy, Jr. | District Judge | 4th Circuit | Allegany | | | 1 |
| Hon. John Michael Maloney | Circuit Judge | 6th Circuit | Montgomery | | 6.5 | 6 |
| Hon. Timothy Martin | Associate Circuit Judge | 3rd Circuit | Baltimore County | | 8.7 | 7 |
| Hon. Larnzell Martin, Jr. | Chief Judge | 7th Circuit | Prince George's | | 9.1 | 14 |
| Hon. Julia Martz-Fisher | Circuit Judge | 6th Circuit | Frederick | | 2.4 | 6 |
| Hon. Michael Mason | Associate Circuit Judge | 6th Circuit | Montgomery | | 8.4 | 17 |
| Hon. Karen Mason | Circuit Judge | 7th Circuit | Prince George's | | 1.0 | 2 |
| Hon. Stacy Mayer | Associate District Judge | 3rd Circuit | Baltimore County | | 9.3 | 10 |
| Hon. Lynn Stewart Mays | Circuit Judge | 8th Circuit | Baltimore City | | | 0 |
| Hon. Cheryl McCally | Associate Circuit Judge | 6th Circuit | Montgomery | | 1.7 | 30 |
| Hon. Stacey Wiederle McCormack | Circuit Judge | 5th Circuit | Anne Arundel | | 3.0 | 22 |
| Hon. Mary Beth McCormick | Associate Circuit Judge | 6th Circuit | Montgomery | | 3.4 | 16 |
| Hon. Timothy McCrone | Associate Circuit Judge | 5th Circuit | Howard | | 4.9 | 43 |
| Hon. Terrence McGann | Associate Circuit Judge | 6th Circuit | Montgomery | | 3.1 | 54 |
| Hon. Graydon McKee III | Judge | 7th Circuit | Prince George's | | 10.0 | 1 |
| Hon. John McKenna, Jr. | District Judge | 5th Circuit | Anne Arundel | | 3.0 | 11 |
| Hon. Dana Middleton | Circuit Judge | 8th Circuit | Baltimore City | | 1.0 | 2 |
| Hon. Thomas Miller III | District Judge | 5th Circuit | Anne Arundel | | 8.4 | 12 |
| Hon. Patricia Mitchell | Associate District Judge | 6th Circuit | Montgomery | | 7.0 | 10 |
| Hon. Crystal Mittelstaedt | Associate Circuit Judge | 7th Circuit | Prince George's | | 3.7 | 160 |
| Hon. John Moffett | Associate District Judge | 6th Circuit | Montgomery | | 8.0 | 38 |
| Hon. John Morrissey | Chief Judge | 7th Circuit | Prince George's | | 8.7 | 14 |
| Hon. Danielle Mosley | District Judge | 5th Circuit | Anne Arundel | | 4.1 | 15 |
| Hon. Stephan Moylan | District Judge | 4th Circuit | Garrett | | 9.1 | 2 |
| Hon. William Mulford II | Circuit Judge | 5th Circuit | Anne Arundel | | 4.3 | 84 |
| Hon. Daniel Mumford | District Judge | 1st Circuit | Worcester | | | 8 |
| Hon. M. Brooke Murdock | Associate Judge | 8th Circuit | Baltimore City | | 5.6 | 13 |
| Hon. Timothy Murphy | Associate District Judge | 8th Circuit | Baltimore City | | 8.3 | 2 |
| Hon. Harris Murphy | Circuit Judge | 2nd Circuit | Kent | | | 0 |
| Hon. Jane Cairns Murray | Associate Circuit Judge | 2nd Circuit | Cecil | | | 1 |
| Hon. Terry Myers | Associate District Judge | 4th Circuit | Washington | | 4.0 | 1 |