Monochroa leptocrossa is a moth of the family Gelechiidae.

It is found on the Japanese island of Hokkaido and in the Russian Far East.

[2] Lepidoptera and Some Other Life Forms gives this name as a synonym of Monochroa hornigi.

The plical and second discal stigmata are small, black and distinct.

There is a cloudy white dot on the costa at two-thirds, and one on the tornus slightly before it.