Agaronia hilli is a species of sea snail, a marine gastropod mollusk in the family Olividae, the olives.

[2] (Original description) The shell is of average size for the genus, inflated and bulliform, with a small, acuminate spire.

The anterior one-fourth of the shell features a thick, shiny enamel deposit, sharply contrasting with the silky-textured body whorl.

The shell color is olive-gray, adorned with speckles and small zigzag patterns of darker gray.

The anterior enamel deposit is dark brown on the dorsum, fading to tan near the columella.