Cooleyhighharmony is the debut studio album by American R&B group Boyz II Men. It was first released in the United States by Motown Records on April 30, 1991. The album was mainly written by Boyz II Men members Nathan Morris, Wanya Morris and Shawn Stockman and extensively produced by Dallas Austin. Cooleyhighharmony's title is a tribute to a real high school in Chicago: Cooley Vocational High School.

The album debuted at number 58 on the US Billboard 200 and eventually peaked at number 3. Its original version produced the US Billboard Hot 100 Top 5 singles, "Motownphilly" and "It's So Hard to Say Goodbye to Yesterday."

Cooleyhighharmony was re-released internationally in 1992 (1993 in the US) with remixes and the inclusion of two hit singles: the worldwide hit single "End of the Road" from the Boomerang soundtrack and "In the Still of the Nite (I'll Remember)" which was initially recorded for the TV mini-series The Jacksons: An American Dream.

Cooleyhighharmony has been certified nine times Platinum by the Recording Industry Association of America (RIAA) for shipments of over 9 million units in the US.

In 2009, a two-disc digitally remastered special edition of the album was released, containing remixes as well as two previously unreleased songs.