Sergey Petrovich Mavrin (; 15 September 1951 â 1 April 2025) was a Russian jurist and labour law scholar who served as the judge of the Constitutional Court of Russia from 2005 till his death in 2025.
Mavrin was born in Bryansk on 15 September 1951. From 1970 to 1972, he completed compulsory military service in the Armed Forces of the Soviet Union. In 1977, he graduated from Leningrad State University Faculty of Law. In 1980, he obtained a Candidate of Sciences degree by writing and defending a thesis titled "Law-Enforcement Activities of Economic Agencies in the Field of Labour Relations".
From 1977 to 2005, he taught at Leningrad (later Saint Petersburg) State University. In 1991, he defended his Doctor of Sciences thesis titled "Labour Management: Theoretical and Legal Aspects."
Since 1996, he served as an expert for the ILO Committee of Experts on the Application of Conventions and Recommendations.
On 25 February 2005, the Federation Council appointed Mavrin as a judge of the Russian Constitutional Court upon the nomination of President Vladimir Putin.
Mavrin died in Saint Petersburg on 1 April 2025, at the age of 73.