Kelvin Darnell Hayden, Jr. (born July 28, 1983 in Chicago, Illinois) is a American football cornerback for the Indianapolis Colts of the National Football League. He was originally selected in the second round of the 2005 NFL Draft out of the University of Illinois. He returned a Rex Grossman interception for a touchdown in Super Bowl XLI. It was the first interception of his NFL career.

Hayden attended Hubbard High School in Chicago, and was a four-year starter in football. As a freshman cornerback, he was a first team All-PowerBar team selection and an All-Area selection after posting ten interceptions. As a sophomore quarterback, he passed for 21 touchdowns and rushed for seven more scores. As a junior tailback, he rushed for 2,135 yards (1,952 m), and was an All-Conference pick and an All-Area selection.

Hayden attended Joliet Junior College for two years, where he finished his career with 114 receptions for 1,839 yards (16.13 yards per rec. avg.) and 17 touchdowns and was a two-time All-Conference and an All-Region pick. After losing his first junior college game, he led Joliet JC to 21 consecutive victories and the 2002 NJCAA National Championship. As a sophomore, he was the NJCAA National Offensive National Player of the Year, won first team JC All-America accolades, and was named the Conference Player of the Year, after making 72 receptions for 1,297 yards(18.1 yards per rec. avg.) and 13 touchdowns. He was also named the MVP of the 2002 NJCAA National Championship game. As a freshman, he made 42 receptions for 542 yards (12.9 yards per rec. avg.) and four touchdowns.