| Mary Gray Knob | between Rock Hollow Branch and Rogers Cove Creek in E Haywood County. |
| Mary Knob | on the Haywood-Madison county line. |
| Mary Sander Creek | a tidal creek in S Currituck County N of Poplar Branch Bay. |
| Mary Simmons Ridge | E Watauga County, extends S between Boone Camp Branch and East Ridge. |
| Mary's Creek | rises in S Alamance County in the foothills of the Cane Creek Mountains and flows E into Haw River. |
| Marys Branch | rises in W Avery County and flows E into Roaring Creek. |
| Marys Gap | E Haywood County between Rice Cove and Sassafras Knob. |
| Masa Knob | peak on Swain County, N.C.-Sevier County, Tenn., line in Great Smoky Mountains National Park about halfway between Mount Kephart and Charlies Bunion, lat. 35°38'10" N., long. 83°22'40" W. Alt. over 6,000. Named for George Masa (d. 1933), Japanese photographer whose extensive knowledge of the area, acquired through 18 years’ association with it, was recognized by his appointment as a member of the Nomenclature Committee for the first map of the park. |
| Mascomenge | a village of the Weapemeoc Indians; shown on the White map, 1585, as being on what is now the S tip of Chowan County on Albemarle Sound. |
| Masequetuc | village of the Weapemeoc tribe probably situated on what is now the SE tip of Pasquotank County. Shown on the White map, 1585. Variant spelling: Masquetuc. |