Gregory Michael Hansell (born March 12, 1971) is an American former baseball pitcher.

Hansell played for four different major league ballclubs during his career: the Los Angeles Dodgers (1995), Minnesota Twins (1996), Milwaukee Brewers (1997), and Pittsburgh Pirates (1999). He made his major league debut on April 28, 1995, and played his final game on October 3, 1999.

On December 7, 1999, Hansell was purchased from the Pittsburgh Pirates by the Hanshin Tigers of the Japan Central League. Hansell would attempt a return to Major League Baseball in 2003, but failed to make the big league roster in tryouts with the New York Yankees and Arizona Diamondbacks.

• Career statistics from Baseball Reference, or Fangraphs, or Baseball Reference (Minors)