Alexander (Dena'ina: Tuqen Kaq’) is an unincorporated community in Matanuska-Susitna Borough, Alaska, United States. An Alaska Native community with an Alaska Native Village Corporation, it lies on the Susitna River delta, near the mouth of Alexander Creek, and 27 miles (43 km) northwest of Anchorage, Alaska Cook Inlet Low. It is located within the boundaries of Susitna CDP.