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At the time of the Russian Empire Census of 1897, Mozyrsky Uyezd had a population of 181,161. Of these, 79.5% spoke Belarusian, 16.3% Yiddish, 2.1% Polish, 1.5% Russian, 0.3% German, 0.1% Ukrainian, 0.1% Latvian and 0.1% Czech as their first language.