Belgium sent 14 archers in its second Olympic archery appearance. The six competitors who competed in the fixed bird events had no international competitions, and took the guaranteed 4 gold medals, 2 silvers, and 2 bronzes. Van Innis, a veteran of Belgium's first appearance in 1900, faced a lone French archer in each of the three individual moving bird competitions; he took two of the three gold medals and one silver. In the team moving bird competitions, the Belgian team faced off against France in the 50 and 33 metre events, beating the French team both times. The Netherlands sent a team for the 28 metre competition, which knocked Belgium down to second place in that event.
Overall, the team took 8 of 10 possible gold medals as well as 4 silvers and 2 bronzes. They had been guaranteed 4 golds, 7 silvers, and 3 bronzes at worst.
Three divers represented Belgium in 1920. It was the nation's second appearance in the sport. Sauvage became the first Belgian to advance to a diving final, in the plain high diving. He placed seventh in the final standings.
Twelve swimmers, including one woman, represented Belgium in 1920. It was the nation's fourth appearance in the sport as well as the Olympics. Blitz was the first Belgian to reach a final in an Olympic swimming event, and he won the nation's first Olympic swimming medal with his bronze-winning effort in the 100 metre backstroke.
Belgium competed in the Olympic water polo tournament for the fourth time in 1920, having won a medal each of the prior times but still seeking its first gold medal. The Bergvall System was in use at the time. Belgium blew out Switzerland in the opening round, then squeaked by the Netherlands in the quarterfinals. After defeating Sweden 5–3 in the semifinals, Belgium advanced to the final against Great Britain. For the fourth straight time the two had met in the Olympics, the British side came out on top of the Belgian team, this time by a score of 3–2.
Belgium received a bye into the silver medal semifinals after the loss to Britain. There they faced, and defeated, the United States to take the country's fourth Olympic water polo medal.
42 athletes represented Belgium in 1920. It was the host nation's third appearance in the sport, having not competed in athletics in 1900. The best result for the team was Broos's fourth-place finish in the marathon as the Belgians continued to look in vain for their first Olympic medal in the sport.
13 boxers represented Belgium at the 1920 Games. It was the nation's debut appearance in boxing. Hébrants was the only boxer to advance to the semifinals; he was defeated both in the semifinals and in the bronze medal match to finish with fourth place in the bantamweight.
15 cyclists represented Belgium in 1920. It was the nation's fourth appearance in the sport, with Belgium having competed in cycling each time the nation appeared at the Olympics. George took the country's first Olympic cycling gold medal by winning the 50 kilometre race. The road cycling team took bronze; Belgian cyclists came close to adding more medals with two fourth-place finishes and one fifth-place finish.
Eighteen equestrians represented Belgium in 1920. It was the host nation's third appearance in the sport, being one of only three countries (along with France and the United States) to have taken part in each Olympic equestrian competition to that point. The Belgian vaulters were the most successful, with Bouckaert's gold medal and Finet's bronze in the individual leading the team to a gold medal in the combined event. The Belgians also had success in the other two competitions, adding a silver in the jumping and a bronze in the eventing, though no others took individual medals.
Twenty-two fencers represented Belgium in 1920. It was the host nation's fourth appearance in the sport, having competed in fencing each time Belgium appeared at the Olympics. The best result for the team was a silver medal in the team épée, which was the country's only fencing medal despite having six individual finalists and two teams in event finals.
Belgium competed in field hockey for the first time. The team took third place in the four-team round robin, defeating France but losing to Great Britain and Denmark.
Belgium competed in the Olympic football tournament for the second time, winning the gold medal. The Belgians, which had taken bronze in 1900, won the 1920 championship without much difficulty. The squad outscored opponents 8 to 1, including holding a 2–0 lead when Czechoslovakia withdrew from the final in protest in the 40th minute.
Forty-eight gymnasts represented Belgium in 1920. It was the host nation's third appearance in the sport. Kempeneers had the best individual performance, finishing fourth. Belgium also sent teams in two of the three team events, winning a silver medal and a bronze.
Belgium competed in the Olympic polo tournament for the first time, taking fourth and last place. The Belgians lost to Great Britain in the semifinals and to the United States in the bronze medal match. Alfred Grisar, Maurice Lysen, Clément Van Der Straten and Gaston Peers de Nieuwburgh took part in the tournament.
Twenty rowers represented Belgium in 1920. It was the host nation's fourth appearance in the sport. None of the team's five boats were able to advance past the first round in its event.
Fourteen sailors represented Belgium in 1920. It was the host nation's second appearance in the sport. Belgium had the dubious distinction of having the only boat to not win a medal—there was only one event in which more than three boats entered, and the two Belgian boats in that event finished first and fourth. The other two Belgian boats earned a silver and a bronze.
Two figure skaters represented Belgium in 1920. It was the host nation's debut appearance in the sport. The pair finished in sixth place out of eight pairs.
Twenty-four shooters represented Belgium in 1920. It was the host nation's third appearance in the sport. J. Haller and G. Sylva also competed, but in which events is unknown.[8] In addition, five unknown Belgian shooters competed.[9] Belgium finished with a lone medal, the silver in the team clay pigeons competition.
Belgium competed in the Olympic tug of war tournament for the first time in 1920, the final appearance of the sport in the Olympics. The Bergvall System was used. Losing their first match to Great Britain eliminated the Belgians from the gold medal tournament, but a win against the United States set them opposite the Netherlands for the silver medal. Belgium lost this match and was relegated to the bronze medal tournament; there, they again faced and again defeated the Americans to take the bronze.
Seven weightlifters represented Belgium in 1920. It was the host nation's debut appearance in the sport. Three of the Belgians took medals, one of each type, with François de Haes taking the top spot in the featherweight category.
Twelve wrestlers competed for Belgium in 1920. It was the nation's third appearance in the sport. None of the Belgians won medals, though twice a wrestler was defeated in the bronze medal match. Two of the wrestlers competed in both Greco-Roman and freestyle wrestling.
^La VIIe Olympiade à Anvers, la treizième journée - Aviron, la première journée - II. Course à deux rameurs en couple sans barreur (double scull), La Meuse, 29 August 1920
^La VIIe Olympiade à Anvers, la quatorzième journée - Aviron, la deuxième journée - III. Course à deux rameurs en pointe, La Meuse, 31 August 1920
^La VIIe Olympiade à Anvers, la quatorzième journée - Aviron, la deuxième journée - I. Course à quatre rameurs en pointe avec barreur, La Meuse, 31 August 1920
^La VIIe Olympiade à Anvers, la treizième journée - Aviron, la première journée - II. Course à huit rameurs en pointe avec barreur, La Meuse, 29 August 1920