Nikolai Vasilyevich Smirnov (Russian: ??????? ?????????? ???????) (17 October 1900 – 2 June 1966) was a Soviet Russian mathematician noted for his work in various fields including probability theory and statistics.Smirnov's principal works in mathematical statistics and probability theory were devoted to the investigation of limit distributions by means of the asymptomatic behaviour of multiple integrals as the multiplicity is increased with limit.
He was one of the creators of the nonparametric methods in mathematical statistics and of the theory of limit distributions of order statistics.