Wrestling at the 2008 Summer Olympics – Men's Greco Roman 66 kg

Men's Greco-Roman 66 kg competition at the 2008 Summer Olympics in Beijing, China, was held on August 13 at the China Agricultural University Gymnasium.

This Greco-Roman wrestling competition consists of a single-elimination tournament, with a repechage used to determine the winner of two bronze medals. The two finalists face off for gold and silver medals. Each wrestler who loses to one of the two finalists moves into the repechage, culminating in a pair of bronze medal matches featuring the semifinal losers each facing the remaining repechage opponent from their half of the bracket.

Each bout consists of up to three rounds, lasting two minutes apiece. The wrestler who scores more points in each round is the winner of that rounds; the bout ends when one wrestler has won two rounds (and thus the match).