Kwajalein Atoll is part of the Republic of the Marshall Islands. The southernmost and largest island in the atoll is named Kwajalein Island, which its majority English-speaking residents often use the shortened name, Kwaj. The total land area of the atoll amounts to just over 6 square miles. It lies in the Ralik Chain, 2,100 nautical miles southwest of Ho…Kwajalein Atoll is part of the Republic of the Marshall Islands. The southernmost and largest island in the atoll is named Kwajalein Island, which its majority English-speaking residents often use the shortened name, Kwaj. The total land area of the atoll amounts to just over 6 square miles. It lies in the Ralik Chain, 2,100 nautical miles southwest of Honolulu, Hawaii.