S Embassy] Luxembourg
Luzon Philippines
Luzon Strait Pacific Ocean
Lyon [US Consulate General] France

Macao Macau
Macedonia Bulgaria; Greece; Yugoslavia
Macquarie Island Australia
Madeira Islands Portugal
Madras [US Consulate General] India
Madrid [US Embassy] Spain
Magellan, Strait of Atlantic Ocean
Mahe Island Seychelles
Maiz, Islas del (Corn Islands) Nicaragua
Majorca (Mallorca) Spain
Majuro [US Special Office] Marshall Islands
Makassar Strait Pacific Ocean
Malabo [US Embassy] Equatorial Guinea
Malacca, Strait of Indian Ocean
Malaga [US Consular Agency] Spain
Malagasy Republic Madagascar
Male [US post not maintained, Maldives
representation from Colombo,
Sri Lanka]
Mallorca (Majorca) Spain
Malpelo, Isla de Colombia
Malta Channel Atlantic Ocean
Malvinas, Islas Falkland Islands (Islas Malvinas)
Managua [US Embassy] Nicaragua
Manama [US Embassy] Bahrain
Manaus [US Consular Agency] Brazil
Manchukuo China
Manchuria China
Manila [US Embassy] Philippines
Manipa Strait Pacific Ocean
Mannar, Gulf of Indian Ocean
Manua Islands American Samoa
Maputo [US Embassy] Mozambique
Maracaibo [US Consulate] Venezuela
Marcus Island (Minami-tori-shima) Japan
Mariana Islands Guam; Northern Mariana Islands
Marion Island South Africa
Marmara, Sea of Atlantic Ocean
Marquesas Islands French Polynesia
(Iles Marquises)
Marseille [US Consulate General] France
Martin Vaz, Ilhas Brazil
Mas a Tierra Chile
(Robinson Crusoe Island)
Mascarene Islands Mauritius; Reunion
Maseru [US Embassy] Lesotho
Matamoros [US Consulate] Mexico
Mazatlan [US Consulate] Mexico
Mbabane [US Embassy] Swaziland
McDonald Islands Heard Island and McDonald Islands
Medan [US Consulate] Indonesia
Mediterranean Sea