David Robert Pack (born July 15, 1952) is an American singer and musician best known as co-founder, lead vocalist, and guitarist of the rock band Ambrosia in the 1970s and 80s.

Hits from the band written and sung by Pack include certified gold singles "Biggest Part of Me" (1980), "You're the Only Woman (You & I)" (1980) and "How Much I Feel" (1978).

The album generated three charting singles, the greatest of which was "I Just Can't Let Go" (US AC #13), a collaboration with Michael McDonald and James Ingram.

Pack joined producer Alan Parsons on his 2001 live tribute tour to the music of the Beatles called A Walk Down Abbey Road.

He has also produced music for Chet Atkins, Patti Austin, David Benoit, Natalie Cole, Chick Corea, Andrae Crouch, DC Talk, Amy Grant, Faith Hill, Bruce Hornsby, Jennifer Hudson, James Ingram, Patti LaBelle, Little Richard, Branford Marsalis, Bette Midler, Michael McDonald, Brian McKnight, Olivia Newton-John, The Pointer Sisters, LeAnn Rimes, Linda Ronstadt, Brian Setzer, Mavis Staples, Take 6, Steve Vai, Trisha Yearwood, and CeCe Winans.

Pack brought together Ray Charles, Patti LaBelle, Kenny Loggins, Boz Scaggs and Christopher Cross for the event.

In 2005, he produced and directed the 2005 World Aids Day Concert at Saddleback Church in Orange County for author and pastor Rick Warren.