Corey Jermaine Chamblin (born May 29, 1977) is an American football coach who is the defensive coordinator for the St. Louis Battlehawks of the United Football League (UFL). He was previously the defensive backs coach for the San Antonio Brahmas. He is a former professional gridiron football defensive back and was signed by the Baltimore Ravens of the National Football League (NFL) as an undrafted free agent in 1999. He played college football at Tennessee Tech. As a player, Chamblin has also been a member of the Jacksonville Jaguars, Green Bay Packers, Tampa Bay Buccaneers, Denver Broncos, Rhein Fire, and Indianapolis Colts.

He was head coach of the Saskatchewan Roughriders of the Canadian Football League (CFL) from 2012 to part-way through 2015. He won the 101st Grey Cup and was awarded the Annis Stukus Trophy, given to the CFL's Coach of the Year, in 2013.

Chamblin was a preseason All-Ohio Valley Conference selection his senior year at Tennessee Tech. He played in 43 games with 35 starts, totaling 161 tackles, three interceptions, eight passes defensed and two blocked punts.

Chamblin signed with the Baltimore Ravens as an undrafted free agent, but was waived on September 5.

Chamblin signed with the Jacksonville Jaguars' practice squad on September 7, before being released on September 21 and signed to the active roster. He appeared in eleven regular season games for the Jaguars, all on special teams, where he notched three special teams tackles and blocked a punt in a divisional playoff game against the Miami Dolphins.

On August 3, 2001, the Green Bay Packers signed Chamblin.

On January 28, 2002, Chamblin signed with the Tampa Bay Buccaneers.

On January 6, 2003 the Denver Broncos signed Chamblin to a future contract. On August 22, 2003, he was waived by the Broncos.