Matthew "Matt" Benedict Walker MBE (born 25 April 1978 in , England) is a British swimmer who has participated in four Paralympic Games, winning eleven medals. He competes in the S7 (butterfly and freestyle), SM7 (medley) and SB7 (breaststroke) classifications.
Walker's first international medal came with a bronze in the 100 m breaststroke at the 1997 European Championships in Spain. Since then he has gone on to win four further European Championship medals and eight World Championship medals. He also won a bronze medal in the 50 m freestyle and finished fourth in the 100 m freestyle, at the 2006 Commonwealth Games in Melbourne, where he was the only disabled swimmer representing England.
Walker competed in the Paralympics for the first time during the 2000 games, in Sydney. In all he took home three medals from these games, a bronze in the 100 m breaststroke SB7, silver in the 50 m freestyle S7 and gold in the 4×100 m freestyle 34 pts. As part of the gold medal winning relay team, which also included Jody Cundy, Giles Long and David Roberts, he set a new world record time of 4:06.85.
In the 2004 Summer Paralympics, in Athens, Walker won a further two individual medals, silvers in both the 50 and 100 m S7 freestyle events. He was again part of the gold medal winning 4×100 m freestyle 34 pts relay team, which also included Roberts, Graham Edmunds and Robert Welbourn, that set a new world record of 3:59.62.
Beijing 2008 was Walker's third appearance at a Paralympics, and his most successful to date with five medals won. He medalled in both the 50 and 100 m S7 freestyle events, as he had done in Athens, and picked up medals in butterfly and medley events for the first time, winning silver in the 50 m S7 butterfly, with a European record time of 32.24 seconds, and bronze in the 200 m individual medley SM7. Competing alongside David Roberts, Robert Welbourn and Graham Edmunds, Walker won a gold medal in the 4×100 m freestyle 34 pts for the third time in as many Games. This meant that he has now won eleven Paralympic medals, with all of his silver and bronze medals being won individually and all three of his golds being in relay events.