Sergei Mikhailovich Grinkov (born February 4, 1967 - died November 20, 1995) was an Olympic and world figure skating champion.

Sergei Grinkov was born in Moscow, Russia at a time in Soviet Union history when athletic children were identified, sent to special schools, and given rigorous training in their sport. Chosen for training at the Moscow school of skating, at age fifteen he was paired with eleven-year-old Ekaterina Gordeeva. In 1984, they won the World Junior Pairs Championships in Colorado Springs, Colorado .

Sergei Grinkov and his skating partner burst into the international skating spotlight in 1986 when they won the first of their four World Figure Skating Championships. They became repeat world champions the following year and won gold at the 1988 Winter Olympics in Calgary, Alberta, Canada. They then joined a touring group in which they performed for the next five years. By 1989, their skating partnership had blossomed into romance and they married on April 20, 1991. In September of 1992 they had a daughter, Daria Sergeevna Grinkov born in Morristown, New Jersey.

In 1994 they returned to Olympic competition and captured their second gold medal at the 1994 Winter Olympics in Lillehammer, Oppland, Norway. After these Olympics, they returned to professional skating and took up residence in Simsbury, Connecticut, United States. In November of 1995, twenty-eight-year-old Sergei Grinkov collapsed and died from a massive heart attack at Lake Placid, New York while practicing with his wife for their upcoming performance in the "Stars on Ice" tour.

Sergei Grinkov is interred in the Vagan'kovskoye Cemetery in Moscow.