Rehan Jahangir Poncha (Hindi: रेहान जहांगीर पोंचा; born August 3, 1986) is a five-time national champion Indian swimmer and Arjuna Award winner, who specialized in backstroke, butterfly, and individual medley events. He is also the recipient of the Eklavya Award from the Karnataka Olympic Association. He is a 5-time Indian swimming champion, and a 6-time record holder in the butterfly (both 100 and 200 m). Poncha also set two of his records in the freestyle and medley relays at the 2009 Asian Swimming Championships in Foshan, China, along with his teammates Sandeep Sejwal, Virdhawal Khade, and Aaron D'Souza.
Poncha qualified for the men's 200 m butterfly at the 2008 Summer Olympics in Beijing, by clearing a FINA B-standard entry time of 2:01.40 from the Telstra Grand Prix in Sydney, Australia. He edged out Peru's Emmanuel Crescimbeni to take a second spot in heat 1 by 0.24 of a second in 2:01.89. Poncha failed to advance into the semifinals, as he placed fortieth overall in the preliminaries. He has agreed to be a mentor for Indian Collegiate Athletic Program to support the future athletes and guide them to excel in swimming.
Rehan completed his education in Jain University located in Bangalore.