Agonopterix cajonensis is a moth in the family Depressariidae. It was described by John Frederick Gates Clarke in 1941. It is found in North America, where it has been recorded from California.[1]
The wingspan is 20–23 mm. The forewings are grayish fuscous, overlaid with ocherous-white. The base of the forewings is and the basal third of the costa is ocherous-white. The light basal area is followed by a dark fuscous shade. The whole forewing is irrorated (speckled) with small fuscous spots and there is an ocherous-white spot, narrowly edged with fuscous, at the end of the cell. The hindwings are grayish fuscous.[2]