Morganellaceae is a family of Gram-negative bacteria that include some important human pathogens formerly classified as Enterobacteriaceae. This family is a member of the order Enterobacterales in the class Gammaproteobacteria of the phylum Pseudomonadota. Genera in this family include the type genus Morganella, along with Arsenophonus, Cosenzaea, Moellerella, Photorhabdus, Proteus, Providencia and Xenorhabdus.

The name Morganellaceae is derived from the Latin term Morganella, referring the type genus of the family and the suffix "-aceae", an ending used to denote a family. Together, Morganellaceae refers to a family whose nomenclatural type is the genus Morganella.

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