Vadim Yaroshchuk (Russian: Вадим Ярощук) (born April 2, 1966) is a former butterfly and medley swimmer from the Soviet Union.

During his competitive swimming career, Yaroshchuk earned a reputation as one of the world's fastest butterfly swimmers, which was reflected in his commanding early lead during the butterfly leg (first 50 meters) of the 200-meter individual medley at the 1988 Olympics.

Although he maintained his lead into the final 50 meters of the race, Yaroshchuk was ultimately overtaken by then-world record holder Tamás Darnyi of Hungary (Gold) and Patrick Kühl of East Germany (Silver).

[1] Yaroshchuk won a second Bronze at the 1988 Olympics as a member of the Soviet 4x100 medley relay team, along with Igor Polyansky, Dmitry Volkov, and Gennadiy Prigoda.

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