Heiki Nabi (born 6 June 1985) is an Estonian Olympic champion Greco-Roman wrestler.

At the 2006 World Wrestling Championships he won the gold medal in the men's Greco-Roman (96 kg) category and became the first amateur wrestling World Champion for his home country, because previous Estonian wrestling World Champion August Englas (1953 and 1954) competed for Soviet Union.

At the 2012 Summer Olympics in London, Nabi won the silver medal in the Men's Greco-Roman 120kg.

He competed at the 2024 European Wrestling Olympic Qualification Tournament in Baku, Azerbaijan hoping to qualify for the 2024 Summer Olympics in Paris, France.

However, Nabi received a quota due to reallocations of Individual Neutral Athletes (AIN) claimed by the IOC, garnering him a place on the Estonian Olympic team.