anna karin larsson (later "ahlström", 30 august 1941 – 21 september 2019) was a swedish swimmer. she won a bronze medal at the 1958 european aquatics championships in the 4×100 m freestyle relay. she competed in the same event at the 1956 and 1960 summer olympics and finished sixth in both games. she was eliminated in the preliminaries of the 100 m and 400 m freestyle.