The ambassador extraordinary and plenipotentiary of Russia to Costa Rica is the official representative of the president and the government of the Russian Federation to the president and the government of Costa Rica.
The ambassador and his staff work at large in the Embassy of Russia in San José. The post of Russian ambassador to Costa Rica is currently held by , incumbent since 18 March 2019.
Diplomatic relations between Costa Rica and the Soviet Union were established on 8 May 1944, when the incumbent representative to Mexico, Konstantin Umansky, was given dual accreditation to Costa Rica. Umansky's tenure was shortlived, when he and several others were killed in a plane crash on 25 January 1945 while travelling to present his credentials to the president of Costa Rica. Following this, it was not until 1970, that the two sides agreed to exchange diplomatic missions. The Russian embassy in San José was opened in 1972, and the Costa Rican embassy in Moscow in 1975. was assigned as ambassador to Costa Rica on 15 July 1971.
Representation continued through the late twentieth century. With the dissolution of the Soviet Union, Costa Rica recognized the Russian Federation as its successor state on 28 December 1991. The incumbent Soviet ambassador, , continued as the Russian ambassador until 1996.