The women's 100 metre breaststroke competition of the swimming events at the 1973 World Aquatics Championships took place on September 5.

Records

Prior to the competition, the existing world and championship records were as follows. The following records were established during the competition:

Results

24 swimmers participated in 3 heats, qualified swimmers are listed:

The results of the final are below.

{{DEFAULTSORT:Swimming at the 1973 World Aquatics Championships - Women's 100 metre breaststroke Breaststroke 100 metre, women's World Aquatics Championships 1973 in women's swimming