Belarus competed at the 2012 Summer Olympics in London, United Kingdom, from 27 July to 12 August 2012. This was the nation's fifth appearance at the Summer Olympics in the post-Soviet era. The Belarus Olympic Committee sent a total of 166 athletes to the Games, 90 men and 76 women, to compete in 20 sports.

The men's singles table tennis event was part of the table tennis programme at the 2012 Summer Olympics in London. The event took place from Saturday 28 July to Thursday 2 August 2012 at ExCeL London. The tournament was a single elimination tournament with a third place playoff played between the two losing semi-finalists. In the 2008 event all three medals were won by Chinese athletes with Ma Lin taking gold.