Kuskokwim Bay is a bay in southwestern Alaska, at about 59°30′N 162°30′W / 59.500°N 162.500°W. It is about 160 km long, and 160 km wide. The Kuskokwim River empties into Kuskokwim Bay. The bay got its name from the river. The largest community on the bay is the city of Quinhagak.