Sevastyanov () is a Russian masculine surname, its feminine counterpart is Sevastyanova. The name is derived from the male given name Sebastian and means literally Sebastian's. It may refer to:
P. I. Sevastyanov, 19th century Russian scholar who took the first photographs of Hilandar manuscripts and acts, in 1851, 1857|58 and 1859/60, sponsored by the Russian Imperial Academy.