Olonets Governorate
Between 1918 and 1921 parts of Pozhekhonsko-Volodarsky Uyezd of Yaroslavl Governorate were transferred to Cherepovetsky Uyezd, parts of Kirillovsky Uyezd were transferred to Kadnikovsky Uyezd of Vologda Governorate and Kargopolsky Uyezd of Olonets Governorate, and parts of Tikhvinsky Uyezd were transferred to Borovichsky and Malo-Vishersky Uyezds of Novgorod Governorate.