The Northern Mariana Islands, together with to the south, compose the archipelago. The southern islands are , with level terraces and fringing reefs. The northern islands are volcanic, with active on several islands, including , , and . The volcano on Agrihan, , has the highest elevation at 3,166 feet (9. .
北马里亚纳群岛自由邦（：Sankattan Siha Na Islas Mariånas；英語：Commonwealth of the Northern Mariana Islands，縮寫为CNMI）是的一個，位于西上的战略要地。它包括了15个岛屿，總长685英尺（209米），位於到約四分之三的距離上。北马里亚纳群岛在2020年的正式裡有4萬7,329人 。北马里亚纳群岛總面積為463.63.
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