Cambarellus puer is a species of crayfish in the family Cambaridae.

[2] It is native to the United States, where it can be found in Oklahoma, Texas, Louisiana, Illinois, Arkansas, Mississippi, Tennessee, and Kentucky.

[3] This crayfish lives in a variety of habitat types, including artificial habitats such as roadside ditches.

It is generally found with aquatic vegetation, and it burrows into the substrate during dry periods.

[2] It is listed as a least-concern species by the International Union for Conservation of Nature (IUCN), because it is "secure, widespread and abundant".