[2][3][4] The order contained a large, diverse group of species, occupying distinct ecological niches and possessing a variety of biochemical characteristics.

[6] The assignment and classification of this order was largely based on 16S rRNA genome sequences, which is known to have low discriminatory power and yield different results depending on the algorithm and organism strain used.

In 2016, "Enterobacteriales" was proposed to be reclassified as Enterobacterales, and the type genus changed to Enterobacter in accordance with the International Code of Nomenclature of Prokaryotes.

[1] As of 2021, the order Enterobacterales contains 7 validly published families (Budviciaceae, Enterobacteriaceae, Erwiniaceae, Hafniaceae, Morganellaceae, Pectobacteriaceae and Yersiniaceae).

Pasteurellales (outgroup) Budviciaceae Morganellaceae Hafniaceae Yersiniaceae Pectobacteriaceae Erwiniaceae Enterobacteriaceae The following genera have been validly published, thus they have "Standing in Nomenclature".