The Neogregarinorida are an order of parasitic alveolates in the phylum Apicomplexa.

[1] Species in this order infect insects and are usually found in the fat body, hemolymph, hypodermis, intestine or Malpighian tubules.

The most common site of infection is the fat body: many species are pathogenic for their hosts.

[2] Merogony as part of the life cycle separates them from the Eugregarinorida and appears to have been derived as a secondary characteristic.

A phylogenetic analysis of the small subunit RNA suggests Ophryocystis may actually be a eugregarine rather than a neogregarine.