Beijerinckia is a genus of bacteria from the family of Beijerinckiaceae.

[1][2] Beijerinckia is a free living nitrogen-fixing aerobic microbe.

It has abundant of nitrogenase enzyme capable of nitrogen reduction.Beijerinckia are characterized as nonsymbiotic (i.e., free-living), aerobic, chemoheterorophic bacteria with the ability to fix atmospheric nitrogen.

They can be distinguished from other nitrogen-fixing bacteria by cell morphology and some physiological characteristics.

Beijerinck, the Dutch microbiologist (1851–1931).