Raphitoma oblonga is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

The shell has a fusiform shape and a rather high acuminate spire.

The whorls are covered with regular longitudinal ribs forming small reticulations when crossed by the spiral riblets.

The ground color of the shell is dark brown, sometimes with white spots.

[2] This marine species occurs in the English Channel.