Leonid Vasilievich Tyagachev (Russian: Леонид Васильевич Тягачёв; born October 10, 1946, Dedenevo, Moscow Oblast, RSFSR, USSR) is a Russian politician, sportsman and honorary president of the Russian Olympic Committee (ROC). Between 2001 and 2010, Tyagachev served as President of the Russian Olympic Committee.
Tyagachev was a skier representing the Soviet Union and became champion of the USSR. During his time as a skier, he participated in several international competitions. Tyagachev was champion of the USSR among teams of physical culture for football, and also a master of sports of the USSR in football.