Adi Prag (; born December 15, 1957) is an Israeli former Olympic swimmer.
He competed for Israel at the 1974 Asian Games in Tehran, Iran, in swimming in the 100 m and 200 m butterfly (coming in 4th in both), in the 200 m freestyle (coming in 5th), in the 100 m freestyle (coming in 6th), and in the 200 m individual medley.
Prag represented Israel at the 1976 Summer Olympics in Montreal, Quebec, Canada, in swimming, at the age of 18. He was the youngest Israeli competitor at the 1976 Games. He competed in the Men's 100 metre butterfly, and came in 6th in Heat 1. He also competed in the Men's 200 metre butterfly, and came in 5th in Heat 2.