Lu
- Ludza, Latvia
- Lufeng, Yunnan, China
- Lugwardine, Herefordshire, England
- Lulu Island, British Columbia, Canada
- Luma Kasai, Angola
- Lumban, Laguna, Philippines
- Lummi Island, Whatcom County, Washington state, USA
- Luristan, Iran
- Luxor, Egypt
- Luzhou, Sichuan, China
- Luzon, Philippines
LyMa
- Ma'malelegala, British Columbia, Canada
- Mabton, Washington, USA
- Macau
- Macau, China
- Macedonia
- Macha, Potosi, Bolivia
- Mackenzie, Alaska, USA
- Mackenzie, Canada
- Mackenzie Delta, Canada
- Mackenzie River, Canada
- Mackenzie River, Northwest Territories, Canada
- Mackenzie River, Yukon, Canada
- Mackenzie River Mouth, Canada
- Mackenzie River Mouth Vicinity, Canada
- Mackenzie River To Coronation Gulf, Canada
- Macusani, Puno, Peru
- Madagascar
- Madang, Papua New Guinea
- Madeira, Portugal
- Madhubani, Bihar, India
- Madhya Pradesh, India
- Maditbe, British Columbia, Canada
- Maditbe, Vancouver Island, British Columbia, Canada
- Madura, Indonesia
- Madurai, Tamil Nadu, India
- Mae Sot, Tak, Thailand
- Magdalena, Colombia
- Magna Graecia, Italy
- Magnesia, Aydin, Turkey
- Maharashtra, India
- Mahe, Seychelles
- Maine, USA
- Mainland, Alaska, USA
- Majipamba, Chimborazo, Ecuador
- Makia, Eastern Highlands, Papua New Guinea
- Malacca, Maluku, Malaysia
- Malaita, Solomon Islands
- Malakula, Vanuatu
- Malampa, Vanuatu
- Malang, Java, Indonesia
- Malawi
- Malaysia
- Mali
- Malir, Sindh, Pakistan
- Malkin Bowl, Canada, British Columbia, Canada
- Maluku, Malaysia
- Manabi, Ecuador
- Manabí or Esmeraldas Province, Ecuador
- Manabí Province, Ecuador
- Manchukuo, China
- Manchuria, China
- Mancos Canyon, Colorado, USA
- Mandalay, Burma
- Mandavi, Gujarat, India
- Manekea, Gulf, Papua New Guinea
- Mangaia, Cook Islands
- Mangualde, Viseu, Portugal
- Manhattan, New York County, Ny, USA
- Manihiki Atoll, Cook Islands
- Manila, Philippines
- Maningrida, Northern Territory, Australia
- Manitoba, Canada
- Manitowaning, Ontario, Canada
- Maniwaki, Kitigan Zibi, Quebec, Canada
- Manning Park, British Columbia, Canada
- Manono, Samoa
- Manson Island, Greenland
- Manus, Papua New Guinea
- Maple Rapids, Michigan, USA
- Maple Ridge, British Columbia, Canada
- Maprik, Papua New Guinea
- Maramba, East Sepik, Papua New Guinea
- Maranhao, Brazil
- Marches, Italy
- Marietta, South Carolina, USA
- Marina del Rey, California, USA
- Marked Luxor, Egypt
- Marovo Lagoon, New Georgia, Solomon Islands
- Marpole, British Columbia, Canada
- Marpolec̓əsnaʔəm, British Columbia, Canada
- Marquesas Islands, France
- Marseilles, France
- Marshall Islands
- Martin's Ferry, Klamath River, California, USA
- Maruko-Machi, Nagano, Japan