Abstract: The research subject of this article is the process of integrating the population of Alaska into American society after the conclusion of the territory's cession deal between Russia and the United States. As the research object, the author chose the school system in Alaska after 1867, as well as the missionary work of Protestant denominations. Additionally, the work touches upon the issue of preserving the Russian presence in the region. The author gives an estimated number of the Russian population in Alaska after 1867 and provides a description of the main centers of concentration of Russian culture in the region. The methodological base of this research and the provisions put forward in this work were founded on the principle of historicism, the comparative historical method, and the systematic approach. The scientific novelty of the article's research consists in using English-language sources on this topic that have not been previously used in Russian historiography. The author's main conclusions are that the assimilation of the Russian-speaking and indigenous populations in Alaska took place unevenly, preserving remnants of centers of Russian culture. Furthermore, the US Congress considered that a key obstacle to the Americanization process of the region was the continuation of the activities of Russian-speaking church-parochial schools.