Thomas Chandler Gailey, Jr. (born January 5, 1952, in Gainesville, Georgia) is an American football coach who last served as offensive coordinator for the National Football League's Kansas City Chiefs. He was formerly head coach of the Georgia Tech Yellow Jackets football team and the Dallas Cowboys.

Gailey had previously served as offensive coordinator for the Miami Dolphins in 2000–01 when the Dolphins posted consecutive 11–5 records. He was on the Pittsburgh Steelers staff from 1994-97 when the Steelers won four straight AFC Central titles and played in one Super Bowl (XXX). He was offensive coordinator in 1997 when Pittsburgh ranked sixth in the NFL in total offense and seventh in scoring. Gailey served as the offensive coordinator for the Kansas City Chiefs in 2008 and three games of the 2009 pre-season before he was relieved of duties by Chiefs head coach Todd Haley.

Gailey attended Americus High School in Americus, Georgia and was a student, an Eagle Scout, and a letterman in football, basketball, baseball, and golf. In football, he was an All-State selection as a quarterback. Gailey graduated in 1970.