Mosalsky Uyezd (''Моса́льский уе́зд '') was one of the subdivisions of the

Kaluga Governorate Kaluga Governorate () was an administrative-territorial unit ('' guberniya'') of the Russian Empire and the Russian SFSR, which existed in 1796–1929. Its capital was Kaluga. Administrative division Kaluga Governorate consisted of the following ...

of the

Russian Empire The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...

. It was situated in the western part of the governorate. Its administrative centre was

Mosalsk Mosalsk () is a town and the administrative center of Mosalsky District in Kaluga Oblast, Russia, located west of Kaluga, the administrative center of the oblast. Population: History First attested in 1231 as Masalsk (), it became the center ...

Demographics

At the time of the Russian Empire Census of 1897, Mosalsky Uyezd had a population of 151,928. Of these, 99.7% spoke

Russian Russian(s) may refer to: *Russians (), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries *A citizen of Russia *Russian language, the most widely spoken of the Slavic languages *''The Russians'', a b ...

and 0.2%

Yiddish Yiddish, historically Judeo-German, is a West Germanic language historically spoken by Ashkenazi Jews. It originated in 9th-century Central Europe, and provided the nascent Ashkenazi community with a vernacular based on High German fused with ...

as their native language.
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References

Mosalsky Uyezd, Uezds of Kaluga Governorate Kaluga Governorate {{Russia-gov-stub