Robert A. Kasting (born August 28, 1950) is a Canadian former competition swimmer who specialized in freestyle and butterfly events.

Kasting represented Canada at the 1972 Summer Olympics in Munich, Germany, where he won the bronze medal in the men's 4x100-metre medley relay, together with Canadian teammates Erik Fish, Bruce Robertson and William Mahony.

At the 1972 Olympic Games he finished in 10th place in both the 100-metre freestyle and the 100-metre butterfly.

[2] Kasting attended Yale University in New Haven, Connecticut, where he was a member of the Yale Bulldogs swimming and diving team in National Collegiate Athletic Association (NCAA) and Ivy League competition from 1970 to 1972.

He was born in Ottawa, Ontario, but raised in Lethbridge, Alberta.