Susitna is a census-designated place in Matanuska-Susitna Borough, Alaska, United States. It is part of the Anchorage Metropolitan Area. As of the 2020 census, the population of the CDP was 11. Susitna was once home to the legendary Athabaskan elder, historian and ethnologist Shem Pete, who documented countless locations travelling thousands of miles within the Matanuska-Susitna region. His works were published in Shem Pete's Alaska: The Territory of the Upper Cook Inlet Dena'ina.