Konstantin Nikolaevich Smirnov (1877 – 1938) was a military Orientalist of the Imperial Russian Army, having the rank of Staff Captain.
He graduated from the Officers’ Courses of Oriental Languages, and served in the Caucasian Military District Staff.
After being issued a "fake" retirement, Smirnov arrived in the Iranian capital of Tehran on 1 July 1907, and would serve as tutor to Ahmad Shah Qajar until 1914.
In the 1920s and 1930s, he functioned as a research associate in the Academy of Sciences of the Georgian SSR of the Soviet Union.
Smirnov wrote numerous works on Iranian history, ethnography and economics.