The Oedogoniales are an order of filamentous freshwater green algae of the class Chlorophyceae.

[1] The oedogoniales have a highly specialized type of oogamy, and an elaborate method of cell division which results in the accumulation of apical caps.

The hairs of Bulbochaete and the heterotrichous system Oedocladium are similar to Chaetophorales, with which they may share a distant relationship.

[citation needed] Members of the order usually inhabit still waters such as lakes and ponds, rather than rivers and streams.

[1] The oedogoniales include free-living and epiphytic members on other algae or freshwater angiosperms.