Osinsky Uyezd
Osinsky Uyezd () was an administrative division of Perm Governorate, Russian Empire, which existed in 1781–1923. The administrative center was the town of Osa. It had an area of . Demographics
At the time of the Russian Empire Census of 1897, Osinsky Uyezd had a population of 321,774. Of these, 82.7% spoke Russian, 10.7% Bashkir, 4.8% Tatar and 1.8% Udmurt as their native language. References

Sources 
Brockhaus and Efron Encyclopedic Dictionary (1890–1907)

 
1781 establishments in the Russian Empire
Uezds of Perm Governorate
History of Perm Krai
History of Udmurtia