Brother Island, Brothers Island, etc. may refer to any of several islands and island groups around the world, including

In the United States

• Brother Island, Niagara River, in New York State, near the Horseshoe Falls
• First Brother Island in the Ohio River, West Virginia, near Belmont
• North and South Brother Islands, East River in New York City, between the Bronx and Riker's Island
• North Brother Island, Connecticut and South Brother Island, Connecticut in the Atlantic Ocean off East Lyme, Connecticut
• The Brothers (San Francisco Bay), two islands, East and West, in California
• The Brothers, Humboldt County, two rocks in Humboldt County, California about 6 miles from the town of Petrolia
• Three Brothers Island, California, a tiny island in Humboldt County, California about 5 miles from the town of Petrolia
• Three Brothers (islands), Alaska, a reef near Shakmanof Point, Kodiak Island, Alaska
• Three Brothers islands, in Lake George, near Bolton, New York State

Elsewhere

• Brother Isle in the Shetland archipelago, Scotland, UK
• Great Iyu Island and Little Iyu Island, also known as The Brothers, in the Strait of Malacca
• Middle Brother Islet, Queensland in the Torres Strait off Queensland, Australia
• North Brother Island, India and South Brother Island, India, in the Andaman Archipelago, Indian Ocean
• Pandang Island and Salahnama Island, also known as The Brothers, in the Strait of Malacca
• Rukan Islands also known as Three Brothers (North, Middle and South) at the south entrance of Durian Strait, Indonesia
• Seven Brothers (islands) in the Bab-el-Mandeb strait off Djibouti
• The Brothers (islands), New Zealand in Cook Strait
• The Brothers (islands), Hong Kong, East and West, in the mouth of the Pearl River
• The Brothers, Egypt in the Red Sea
• The Brothers, Greece in the Aegean Sea
• Samhah and Darsah, an island pair in the Socotra archipelago, off the Horn of Africa, known as "The Brothers" (Arabic: Al-Ikhwān)
• Three Brothers (islands), Chagos (North, Middle and South) in the Chagos Archipelago, Indian Ocean
• Three Brothers, Lake Baikal, at Cape Sagan Khushun, near Olkhon, Lake Baikal, Russia
• Three Brothers, Okhotsk Sea, three large rocks off Veselaya Bay, near the town of Magadan, Kamchatka, Russia
• Three Brothers or Tri Brata, three tall rocks in the Avacha Bay of Kamchatka, Russia

See also

• Sister Island (disambiguation)
• Isabel Island (Philippines) and Carlota Island in the Philippines, formerly comprising the barrio of Isla de los Hermanos ("Brothers Island")
• Eadie Island, Aspland Island, and O'Brien Island in the South Shetland archipelago off Antarctica, called Ostrova Tri Brata ("Three Brothers Islands") by their Russian discoverer
• Riddarholmen, an islet in central Stockholm, sometimes called Gråbrödraholm ("Grey Brothers Islet") between the 13th and 17th centuries