The ambassador of Russia to Sri Lanka is the official representative of the president and the government of the Russian Federation to the president and the government of Sri Lanka.
The ambassador and his staff work at large in the Russian Embassy in Colombo. The current Russian ambassador to Sri Lanka is , incumbent since 8 September 2022. The ambassador to Sri Lanka has dual accreditation as the non-resident ambassador to the Maldives since 1966. There is a consulate-general in Malé, Maldives.
Diplomatic relations between the Soviet Union and what was then Ceylon were formally established in December 1956, with the appointment of the first ambassador, , appointed on 19 February 1957. Representatives were thereafter exchanged between the two nations, and after the renaming to Sri Lanka in 1972. With the dissolution of the Soviet Union in 1991, Sri Lanka recognised the Russian Federation as its successor state, and exchange of ambassadors have continued.
Diplomatic relations between the Soviet Union and the Republic of Maldives were established on 14 September 1966, with the incumbent Soviet ambassador to Sri Lanka, , concurrently accredited to the Maldives. The Maldives recognised the Russian Federation on 31 December 1991, and there was an honorary consul based in the Maldives from at least 2000. Diplomatic relations continued to develop, and in February 2019 the Maldives decided in principal to establish an embassy in Russia, with Russia agreeing in July 2021 to establish a consulate-general in Malé. The first consul-general was appointed in December 2024.