Swimming at the Summer Olympics

Lore & Background

In the first four Olympics, competitions were held in open water: the Mediterranean Sea in 1896, the Seine in 1900, an artificial lake in 1904, and the Mediterranean again in 1906. (Note: The 1906 Intercalated Games are not officially recognized by the IOC as an Olympic Games.) The 1904 races were the only ones measured in yards. A 100-metre pool was built for the 1908 Olympics inside the main stadium's track and field oval. The 1912 Olympics, held in Stockholm harbor, introduced electrical timing. Male swimmers wore full body swimsuits until the 1940s, which caused more drag. Pool designs have since lessened drag through depth, wave elimination, lane width, and other innovations. The 1924 Olympics first used the standard 50-metre pool with marked lanes. Diving blocks were introduced in 1936, the flip-turn developed by the 1950s, and goggles first allowed in 1976.

Reader's Guide

Swimming at the Summer Olympics has evolved significantly since its open-water beginnings. The sport's consistent inclusion across all modern Games underscores its foundational role in the Olympic movement. Key milestones include the standardization of the 50-metre pool in 1924, the addition of women's events starting in 1912, and the introduction of the butterfly stroke as a separate discipline in 1956. Event distances have expanded over time, with the women's 1500 metres and men's 800 metres added in 2020, and the mixed 4 × 100 metres medley relay also debuting that year. The 2028 Games will add men's and women's 50 metre backstroke, breaststroke, and butterfly. Times have consistently dropped due to better training, pool design, and swimwear technology. The sport's medal count is second only to athletics, reflecting its breadth and popularity.

Did You Know?

• The 1904 Olympics races were the only ones ever measured in yards instead of metres.
• Swimming goggles were first allowed at the Olympics in 1976.
• The butterfly stroke became its own event in 1956; before that, it was permitted in breaststroke races.
• The mixed 4 × 100 metres medley relay (2 women and 2 men) was added in the 2020 Olympic Games.