Derek Roy (born May 4, 1983) is a Canadian professional ice hockey centre and an alternate captain of the Buffalo Sabres of the National Hockey League (NHL). He is the son of Felix and Coleen Roy, brother to Robert John and Scott Roy.
Roy led the Kitchener Rangers of the OHL with 87 points during the 1999–00 season, and won the OHL Rookie of the Year trophy. The next season, he scored 42 goals and 81 points. He was drafted 32nd overall by the Buffalo Sabres in the 2001 NHL Entry Draft. The next season, Roy set OHL career highs in goals and points and continued to be the Rangers' leading scorer.
In the Fall of 2002, Roy played for the Sabres in their preseason games. Despite his strong showing, he returned to the Rangers for the 2002–03 season, his last in the OHL. Roy captained the Rangers to an OHL championship, amassing 32 points in 21 playoff games en route to capturing the 2003 Memorial Cup. Roy won the Stafford Smythe Memorial Trophy as Memorial Cup MVP.