Robert Wayne Colomby (born 20 December 1944, in New York) is a jazz-rock fusion drummer, record producer and television presenter. He is best known as an original member of the group Blood, Sweat & Tears, which he co-founded in 1967. He has also played with many other musical artists.

Bobby Colomby played on the first Blood, Sweat & Tears album, Child Is Father to the Man, which was released in 1968 and reached #47 on the US Billboard Pop Albums chart.

The group's self-titled second album was an even bigger critical and commercial hit. It reached #1 on the same chart and featured 3 hit singles, And When I Die, You've Made Me So Very Happy and Spinning Wheel. The group appeared at the Woodstock festival in August 1969 and the album won a Grammy Award for Album of the Year in 1970.

He is the uncredited drummer on John Cale and Terry Riley's collaboration album Church of Anthrax, which was released in February 1971.

Colomby was the last original member of Blood, Sweat & Tears when he stopped performing with the group in 1976. After many changes in the group membership he became (in the end) the de facto owner of the Blood Sweat & Tears name.

He produced the debut solo album by jazz bass virtuoso Jaco Pastorius in 1976 and The Jacksons' comeback album Destiny in 1978.

He played drums and percussion on Eddie Palmieri's Grammy nominated album Lucumi, Macumba & Voodoo in 1978.

For a few years in the late 1980s Colomby was a reporter for the television programs Entertainment Tonight and CBS This Morning.

In 2002 Colomby began producing a series of albums for trumpeter Chris Botti, including, December, When I Fall in Love, To Love Again, Italia and Impressions and the DVDs Chris Botti Live with Special Guests and Chris Botti in Boston.

He has also worked with Paula Cole (Courage), Jeff Lorber (He Had a Hat) and Leo Amuedo (Guitar Stories).

Colomby maintains ownership of the "Blood, Sweat & Tears" band name and, although he no longer plays with the band, he still oversees their musical direction.