Alona is a genus of cladocerans in the family Chydoridae.

It is one of the largest genera of Cladocera,[1] and is widely believed to be an artificial group which is in need of systematic revision; the type species is Alona quadrangularis.

[2] Around 240 names at the species level have been described in Alona; it is unclear how many of these are valid, or how they are related.

[3] Species currently assigned to the genus Alona include:

This Branchiopoda-related article is a stub.