North Andaman Island is the northernmost island of Great Andaman, and also the largest of the Andaman Islands, with an area of 2,781 km². The island is also home to the highest point in the archipelago, Saddle Peak at over 700 metres.

North Andaman experiences fairly frequent large earthquakes and suffered inundation from the 2004 Indian Ocean earthquake tsunami.

The main town on the island is Diglipur . Known for its marine life , the island's main industries are rice and orange-growing.