| Dr Norman McLean FBA | Year of birth 1865 | Year of death 1947 | Year elected 1934 | Fellowship category UK |
| Professor Charles Howard Mcllwain FBA | Year of birth 1871 | Year of death 1968 | Year elected 1941 | Fellowship category Corresponding |
| Professor the Revd John McManners FBA | Year of birth 1916 | Year of death 2006 | Year elected 1978 | Fellowship category UK |
| Rt Hon Lord Arnold McNair CBE, QC, FBA | Year of birth 1885 | Year of death 1975 | Year elected 1939 | Fellowship category UK |
| Professor William McNeill FBA | Year of birth 1917 | Year of death 2016 | Year elected 1976 | Fellowship category Corresponding |
| Dr John McTaggart Ellis McTaggart FBA | Year of birth 1866 | Year of death 1925 | Year elected 1906 | Fellowship category UK |
| Professor William Mead FBA | Year of birth 1915 | Year of death 2014 | Year elected 1994 | Fellowship category UK Emeritus |
| Professor James Meade CB, FBA | Year of birth 1907 | Year of death 1995 | Year elected 1951 | Fellowship category UK |
| Sir Peter Medawar OM, CH, CBE, FRS, Hon FBA | Year of birth 1915 | Year of death 1987 | Year elected 1981 | Fellowship category Honorary |
| Professor Wayne Meeks FBA | Year of birth None | Year of death 2023 | Year elected 1992 | Fellowship category Corresponding |
| Rt Hon Sir Robert Megarry FBA | Year of birth 1910 | Year of death 2006 | Year elected 1970 | Fellowship category UK |
| Mr Russell Meiggs FBA | Year of birth 1902 | Year of death 1989 | Year elected 1961 | Fellowship category UK |
| Professor Donald Meinig FBA | Year of birth 1924 | Year of death 2020 | Year elected 1991 | Fellowship category Corresponding |
| Professor Millard Meiss FBA | Year of birth 1904 | Year of death 1975 | Year elected 1973 | Fellowship category Corresponding |
| Professor Giorgio Melchiori CBE, FBA | Year of birth 1920 | Year of death 2009 | Year elected 1991 | Fellowship category Corresponding |
| Mr James Mellaart FBA | Year of birth 1925 | Year of death 2012 | Year elected 1980 | Fellowship category UK Emeritus |