Gastroserica kachin is a species of beetle of the family Scarabaeidae. It is found in Myanmar.
Adults reach a length of about 5.2 mm. They have a dark blackish, oval body. The dorsal surface is shiny, with some blue-iridescent shine, while the legs and antennal club are black to dark brown. The antennal funiculus is yellow. The dorsal surface is nearly glabrous.
The species is named after its occurrence in the Kachin Province.