Elachista demogenes is a moth in the family Elachistidae.
The forewings are pale grey, irrorated with dark fuscous, sometimes with a suffusion of black irroration towards the dorsum anteriorly and toward the costa posteriorly.
The plical and second discal stigmata are black.
[3]: 336 The species was described in the family Elachistidae, but was excluded from this family in a later study.
This article on a moth of the genus Elachista is a stub.