Blow fly may refer to:

• Calliphoridae, a family of flies
• Blowfly (musician) (1939-2016), also known by his real name Clarence Reid
• Blow Fly (novel), a 2003 Patricia Cornwell novel

The Calliphoridae (commonly known as blow flies, blow-flies, carrion flies, bluebottles, greenbottles, or cluster flies) are a family of insects in the order Diptera, with 1,100 known species. The family is known to be polyphyletic, but much remains disputed regarding proper treatment of the constituent taxa, some of which are occasionally accorded family status (e.g., Bengaliidae, Helicoboscidae, Polleniidae, and Rhiniidae).

Blow fly may refer to:

• Calliphoridae, a family of flies
• Blowfly (musician) (1939-2016), also known by his real name Clarence Reid
• Blow Fly (novel), a 2003 Patricia Cornwell novel

The Calliphoridae (commonly known as blow flies, blow-flies, carrion flies, bluebottles, greenbottles, or cluster flies) are a family of insects in the order Diptera, with 1,100 known species. The family is known to be polyphyletic, but much remains disputed regarding proper treatment of the constituent taxa, some of which are occasionally accorded family status (e.g., Bengaliidae, Helicoboscidae, Polleniidae, and Rhiniidae).