Achatinella byronii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinellidae.

Achatinella byronii is the type species of the subgenus Bulimella.

The dextral or sinistral shell is imperforate and pyramidal-conic; solid and glossy with an obtuse apex.

Shell color varies, but is typically green and light greenish-yellow in oblique streaks on the last two whorls, with a faint green peripheral band and a dark chestnut band bordering the suture below.

The aperture is white and the lip is bordered with dark brown.