Aglaodiaptomus is a genus of copepods in the family Diaptomidae.

They are often bright red or blue due to carotenoid pigments.

[1] Species distributions are known very imprecisely, and two species are listed as vulnerable species on the IUCN Red List (marked VU below); both are endemic to the United States.

A. kingsburyae was described from "a roadside ditch in Oklahoma and a pool and a pond in Texas", while A. marshianus was described from Lake Jackson, Florida.

[2] The genus Aglaodiaptomus contains 15 species.