Dichomeris plasticus is a moth in the family Gelechiidae. It was described by Edward Meyrick in 1904. It is found in Australia, where it has been recorded from New South Wales.[1]
The wingspan is . The forewings are yellow ochreous, sprinkled with fuscous, with the plical and second discal stigmata small, obscure, dark fuscous. There is a small suffused dark fuscous spot before the tornus. The hindwings are grey, but darker posteriorly.[2]