Konstantin Alexandrovich Westchilov (1877-1945) was a Russian Impressionist painter.

Westchilov was born in Russia in 1877. He studied under Ilya Repin at the Royal Academy of Fine Arts in St. Petersburg. He exhibited at the fir the first time there in 1919, and was active in theatre design at the Petrograd Technical Institute. Westchilov painted a wide variety of subjects in the Impressionist style, but was particularly noted for his seascapes and harbor scenes. He traveled extensively throughout Europe, and immigrated to the United States and settled in New England, where he died.