Dmitry Egorovich Efimov (1811, 1864) was a Russian architect and academic of architecture since 1839. He served as the architect of the Tsarskoye Selo Palace Administration from 1839 and of the Alexander Lyceum from 1845. He was also a historian and theorist of architecture. Born in 1811, he passed away in May 1864. From 1826, he studied at the Academy of Arts and was a pensioner of the Black Sea Fleet. Efimov received several awards: in 1828, two silver medals; in 1832, a second gold medal for a project of a seminary for 200 people; and in 1833, a first gold medal for a project of a residence for a wealthy landowner at his estate. In 1832, he graduated from the Academy of Arts with the title of artist of the XIV class and stayed there for a year for improvement. In 1834, by imperial decree, he was sent abroad, and in 1839, he returned to Russia and was recognized as an academician for his work on the restoration of the Villa Adriana and drawings made during his travels in Nubia and Egypt.

While in Italy, Efimov frequently visited the home of Princess Repnina-Volkonskaya and, according to her recollections, constantly argued with N. V. Gogol. He also traveled through Greece, Egypt, Palestine, and Syria, where he studied architectural monuments. In his later career, Efimov built little but was known and respected as an expert in ancient architecture.