Череповецкая губерния
Sazonovo was founded in 1923 as a selo around the Pokrovsky (since 1924 Sazonovsky) glass-making factory. It had the name of Belye Kresty and belonged to Ustyuzhensky Uyezd of Cherepovets Governorate. On August 1, 1927 Cherepovets Governorate was abolished, and its area became Cherepovets Okrug of Leningrad Oblast. Simultaneously, uyezds were abolished, and Verkhne-Chagodoshchensky District was established, with the center in Belye Kresty. In 1932 the district was renamed into Chagodoshchensky District, and between 1932 and 1935, the district center was located in the urban-type settlement of Bely Bychok (currently Chagoda), but in 1935 it was transferred back to Belye Kresty. On September 23, 1937 Chagodoshchensky District was transferred to newly established Vologda Oblast. In 1947, Belye Kresty was renamed into Sazonovo and obtained the status of urban-type settlement. During the aborted administrative reform of the 1960s, Chagodoshchensky District was briefly disestablished and then reestablished in 1965. After the reestablishment, Chagoda became the district center.