The ambassador of Russia to Sierra Leone is the official representative of the president and the government of the Russian Federation to the president and the government of Sierra Leone.
The ambassador and his staff work at large in the Russian embassy in Freetown. The current Russian ambassador to Sierra Leone is , incumbent since 21 October 2025.
Diplomatic relations between the Soviet Union and Sierra Leone were established on 18 January 1962, shortly after the country's independence from the United Kingdom. The first ambassador, , was appointed on 18 December 1962, and the embassy in Freetown was opened in 1963. With the dissolution of the Soviet Union in 1991, Sierra Leone recognised the Russian Federation as its successor state on 7 December 1991. The Russian embassy in Sierra Leone was closed in September 1992, and since 2 November 1992, the Russian ambassador to Guinea had dual accreditation to Sierra Leone. This practice continued until 21 October 2025, when was appointed the first ambassador solely accredited to Sierra Leone since 1992.