The island has no year-round human inhabitants; however, it is part of the Attawapiskat First Nation's traditional territory and is frequently used for traditional purposes. The surface of Akimiski is flat and slopes gradually to the north. Most of the vegetation that covers the island consists of lichen, moss, sedges, and dwarf black spruce. The island is a coastal wetland that includes mudflats, tidal marshes, and tidal mudflats. Freshwater streams that flow into southwestern James Bay carry sediments and abundant nutrients that help to sustain the productive waterfowl habitat around Akimiski Island.