M
- Halford John Mackinder (UK, 1861–1947)
- Ahmad Bin Majid (born 1432)
- Conrad Malte-Brun
- Victor Adolphe Malte-Brun
- Kenneth Mason
- Doreen Massey
- Abu al-Hasan 'Alī al-Mas'ūdī (896-956)
- Otto Maull
- Simion Mehedinţi (Romania, 1868–1962)
- D. W. Meinig
- Anton Melik
- Alfred Merz
- Megasthenes
- August Meitzen (Germany 1822-1910)
- Anton Melik (Slovenia, 1890–1966)
- Nicolae Milescu
- Don Mitchell
- Mark Monmonier
- Jedidiah Morse
- William G. Moseley
- Hamdollah Mostowfi (1281–1349)
- Al-Muqaddasi (945-1000)
Read more about this topic: List Of Geographers