Brazil competed at the 1948 Summer Olympics in London, United Kingdom. 70 competitors, 59 men and 11 women, took part in 41 events in 11 sports. A Brazilian medal was won for the first time since the country's debut at the 1920 Summer Olympics, with a bronze by the men's basketball team. With seven consecutive victories, the basketball team only lost in the semifinals, against France. In the dispute for bronze, the team coached by Moacir Daiuto beat Mexico by 52 to 47, guaranteeing the first medal ever won by Brazilians not only in Basketball as also in a team sport.
Seven fencers, all men, represented Brazil in 1948.
<small>Ranks given are within the pool.</small>
Three male pentathletes represented Brazil in 1948.
Brazil had two male rowers participate in one out of seven rowing events in 1948.
Seven shooters represented Brazil in 1948.