78 selected
- Maastricht
- Macau
- Macedonia (ancient)
- Madagascar
- Madeira
- Madras
- Madurai
- Magdeburg
- Mahe
- Mainz
- Majapahit
- Malacca
- Malakoff
- Malawi
- Malaya
- Malaya and British Borneo
- Malaysia
- Maldives
- Mali
- Malta
- Malwa
- Man (Isle of Man)
- Manchukuo
- Manchuria
- Mannheim
- Mansfeld
- Mansfeld-Bornstedt
- Mantua
- Maratha
- Marburg
- Marienwerder
- Marseille
- Marshall Islands
- Martinique
- Massachusetts
- Mauritania
- Mauritius
- Mazamet
- Mecklenburg-Schwerin
- Mecklenburg-Strelitz
- Meissen
- Menden
- Meng Chiang (Mengjiang)
- Mengen
- Mengjiang (Meng Chiang)
- Menorca
- Mettmann
- Metz
- Meuselwitz
- Mewar
- Mexico
- Milan
- Miletus
- Moldavia and Wallachia
- Moldova
- Mombassa
- Monaco
- Mongolia
- Montenegro
- Montfort
- Montserrat
- Morocco
- Mouscron
- Mozambique
- Mughal Empire
- Mühldorf-Neumarkt
- Mühlhausen in Thüringen
- Mülheim
- Mulhouse in the Alsace
- Münchberg
- Müncheberg
- München
- Münster in Westphalia
- Münsterberg
- Muscat and Oman
- Myanmar (Burma)
- Mysia
- Mysore
- Not filled in