A single diver represented Switzerland in 1920. It was the nation's debut in the sport. Knuchel competed in the springboard event, but was unable to advance to the final. ; Men Ranks given are within the semifinal group.
Swimming
Four swimmers, all men, represented Switzerland in 1920. It was the nation's debut in the sport. None of the swimmers advanced to an event final. Ranks given are within the heat. ; Men
Water polo
Switzerland competed in the Olympic water polo tournament for the first time in 1920. A modified version of the Bergvall System was in use at the time. Switzerland lost heavily to Belgium in the opening round. Because Belgium eventually finished with the silver medal, Switzerland should have had a chance to play for the bronze; it is not clear why they did not. ; Round of 16 ; Final rank: 9th
Athletics
13 athletes represented Switzerland in 1920. It was the nation's fourth appearance in athletics. A pair of ninth-place finishes were the team's best results. Ranks given are within the heat.
Boxing
A single boxer represented Switzerland at the 1920 Games. It was the nation's debut in boxing. Ireland lost his first match, in the welterweight round of 16.
Fencing
Eight fencers represented Switzerland in 1920. It was the nation's fourth appearance in the sport. Switzerland competed only in the épée competitions. Edouard Fitting was the only Swiss fencer to advance to the quarterfinals, where he was eliminated. The team was much more successful than any of the individuals, advancing to the finals before finishing in fifth overall. Ranks given are within the group.
Ice hockey
Switzerland competed in the inaugural Olympic ice hockey tournament. The team suffered the most lopsided loss of the tournament in a 29–0 defeat by the United States in the quarterfinals, Switzerland's first match. The American team's eventual winning of the silver medal qualified Switzerland for the bronze medal tournament. In the bronze medal semifinals, the Swiss played a closer game but still lost to Sweden, 4–0. ; Quarterfinals ; Bronze medal semifinals ;Final rank: 5th
Rowing
Thirteen rowers represented Switzerland in 1920. It was the nation's debut in the sport. Two of the four boats won medals, with the coxed fours team taking gold and the coxed pairs taking bronze. Ranks given are within the heat.
Skating
Figure skating
A single figure skater represented Switzerland in 1920. It was the nation's debut in the sport. Megroz took eighth place out of nine skaters in the men's singles.
Shooting
Fifteen shooters represented Switzerland in 1920. It was the nation's third appearance in the sport, and first since 1900. The team's five bronze medals gave Switzerland the fourth-most total medals in 1920, but put them behind ten other teams who had won at least one gold or silver.
Tennis
Three tennis players, all men, competed for Switzerland in 1920. It was the nation's debut in the sport. Simon was the only one of the Swiss players to win a match; Syz and Chiesa each lost their first, as did the Simon and Syz pair in the doubles.
Weightlifting
Two weightlifters represented Switzerland in 1920. It was the nation's debut in the sport. Both men won medals, though neither was able to take a gold.
Wrestling
Four wrestlers, all in the freestyle discipline, competed for Switzerland in 1920. It was the nation's debut in the sport. Roth took the gold medal in the unlimited weight class, with Courant taking silver in the light heavyweight.
