| Main Street, 1897 | 3 (photo) |
| Main Street, 1906 | 9 (photo) |
| Mall, Eastridge | 9 |
| Mangum, A. G. | 43, 49 |
| Manpower Program, Gaston County | 39 |
| Mantovani | 23 |
| Marshall, W. F. | 43 |
| Martin Rebecca Chapter No. 117, Order of the Eastern Star | 36 |
| Martin, R. M. | 26 |
| Martin, Solomon, Rev. | 8 |
| Mason, George B. | 24 |
| Masonic Lodge No. 369 | 36 |
| Massey, Floyd, Jr., Dr. | 8 |
| Massey, Lloyd, Jr. | 8 |
| Matthews, J. H. | 27 |
| Mauney, Jeannette (Gastonia High, 1915) | 18 (photo) |
| mayor, first black | 9 |
| McArver, Margaret | 24 |
| McCarter, E. A., Mrs. | 24 |
| McCollum, Leslie O. | 23 |
| McConnell, D. E., Dr. (library) | 21, 43 |
| McFadden, Pauline (Gastonia High, 1915) | 18 (photo) |
| McGinnis, J. V. | 11 |
| McKinney, Chris | 24 |
| McLaughen, George | 44 |
| McLean, J. D. B., Sheriff | 28 (photo) |
| McLean, J. D. B., Sheriff | 28 |
| McLean, Robert | 22 |
| McSwain, George | 20 |
| McWhorter, Sara | 20 |
| Melton, Frank (Rube) | 12 |
| Melvin, A. J. | 48 |
| Mental Health Association, Gaston County | 39 |
| Mental Health Center, Gaston County | 39 |
| Mental Health Inpatient Unit | 39 |
| Merrill, Robert | 24 |
| Methodists, Wesleyan | 34 |
| Michael, Bennie Joe | 23 |
| Michael, F. C., Mrs. | 22, 23 |
| Michael, Ruth Day | 23 |
| Milady's Fashions | 52 (photo) |
| Mill Street | 50 |
| Miller, A. D., Chief | 44 |
| Miller, Andrew C., Dr. | 23 |
| Miller, George R., Dr. | 42 |
| Miller, O. L., Dr. | 42 |
| Modena Cotton Mills | 31, 46, 48 |
| Moloch Elks Lodge No. 468 | 36 |
| Moore, Andrew | 4 |
| Moore, Beeler (1896) | 27 (photo) |
| Moore, H. B. | 49 |
| Moore, J. D. | 46 |
| Moore, J. D., Capt. (1896) | 27 (photo) |
| Moore, J. D., Captain | 26, 33 |
| Moore, Jane (1896) | 27 (photo) |
| Moore, John C. (1896) | 27 (photo) |
| Morris Field | 7 |
| Morris, S. M. | 44 |
| Morris, Steve, Mr. (1927) | 5 (photo) |
| Morrow, Hunter | 22 |
| Morrow, Leroy | 27 |
| Moss, Howie (The Howitzer) | 12 |
| movie theater, AmuseU | 21 |
| movie theater, Carolina | 21 |
| movie theater, Lyric | 21 |
| movie theater, Temple | 21 |
| movie theater, Webb | 21 |
| Mullen, James | 23 |
| murders in Gastonia, numbers of | 1 |
| Museum, Gaston County Art and History | 22 |
| Museum, Mint | 22 |
| Museum, Schiele, of Natural History | 22 |
| Myers, A. G. | 4, 5 |
| Myers, Albert G. | 27, 36 |
| Myers, Kittie | 17 |
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