The Grand Duchy of Finland
acquired in 1809
The Kingdom of Poland
(reconstituted from the lands acquired by Russia via the partitioning of the Polish-Lithuanian Commonwealth under Catherine II).
The Emirate of Bukhara
Nota bene: While geographical dictionaries, topographical surveys, and maps often include these regions in their representations of the empire, the majority of government statistics (on demography, the economy, etc.) do not.