Boris Schapiro (22 August 1909 – 1 December 2002) was a British international bridge player. He was a Grandmaster of the World Bridge Federation, and the only player to have won both the Bermuda Bowl (the world championship for national teams) and the World Senior Pairs championship. He won the European teams championship on four occasions as part of the British team.

Schapiro was born in Riga, Latvia (then part of the Russian Empire) into a prosperous family of Jewish traders. They emigrated at the time of the Russian Revolution, when he was eight years old, and soon settled in England. He was educated at Clifton College and Bradford Technical College in England and at various universities, including the Sorbonne in Paris.

After graduating, Schapiro joined the family horse trading and meat business and worked there until his forties, when he retired to capitalise on his love of gambling by becoming the banker of a baccarat syndicate at Crockford's gaming club in London. He was fluent in Russian, German and French, and used those linguistic skills in the Army Intelligence Corps during World War II.

In 1935, while he was working in Hamburg, his fluency in German led to his being chosen as the interpreter for Viscount Castlerosse when the latter travelled to Berlin to research an article for the Daily Express. In a restaurant, a group of Brownshirts mistook Castlerosse for a Jew and Schapiro for a non-Jew, and abused Castlerosse for drinking with an Aryan. A fight broke out, and as a result Schapiro spent two nights in prison, after which he hastily returned to Britain.

Schapiro had an early marriage to a Russian woman. He later married a second time, to Helen, in 1970.

At age ten in England, Schapiro started playing bridge for money at school. His first major tournament was in 1929, when he went to the US to partner Oswald Jacoby in the World Auction Bridge Pairs Championship. The two players were destined to have great and lengthy careers in the coming world of contract bridge, where Schapiro's first recorded victory was in the World Pairs Championship of 1932, also with Jacoby. (This was before the foundation of the World Bridge Federation, 1957, which has sanctioned all "World" tournaments for many years.)

Schapiro's entry into serious competitive bridge in Britain was delayed until the end of the war. His partnership with Terence Reese, which started in about 1944, was the basis of his most outstanding period as a player. He was also successful with other partners, the last of which was Irving "Haggis" Gordon. Schapiro's bidding in competitive situations was quite outstanding, and his commentary was featured in bridge magazine bidding competitions round the world. Bidding judgement and card-play in defence were the strengths of his game, relative to other experts.

Schapiro won many tournaments. His first major win at teams was Britain's Gold Cup in 1945/46, partnered by Iain Macleod. He won the Gold Cup eleven times in all, at the time a record, and his last win came at the age of 88 in 1997/98, a remarkable 52 years after his first and 33 years after his penultimate success.