Konstantin Andreyevich Somov was born on November 30, 1869, in Saint Petersburg, Russian Empire (currently Russian Federation). He was a son of Andrei Ivanovich Somov and Nadezhda Konstantinovna Lobanova.
Andrei Ivanovich was an art historian and had worked as a curator of the State Hermitage Museum for twenty-two years. Nadezhda Konstantinovna was a musician. The creative atmosphere in the family influenced Konstantin who became passionate about the culture of 18th-century and chose the artistic career.