Baldwin – a peninsula in the eastern part of the Kotzebue Sound, Chukchi Sea, Alaska, USA. It is washed in the west by the waters of the gulf, in the east by Hotham Inlet which connects the Kotzebue Sound with Selawik Lake. The peninsula presents a wide sandspit. In its southwestern part, there is Eschscholtz Bay. In the northern extremity of the peninsula, there is the city of Kotzebue.