Caryocolum cassella is a moth of the family Gelechiidae.

It is found in the France, Germany, Austria, Switzerland, Denmark, Scandinavia, Poland, the Czech Republic, Slovakia, Romania, Estonia, Lithuania, Ukraine, Belarus and Russia.

[1] It is also found in North America, where it has been recorded from Alberta, Saskatchewan, California and Nevada.

[2] A record from Hokkaido, Japan might also refer to this species.

[3] Adults have been recorded on wing from June to late August.