Conus ranonganus is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.
Like all species within the genus Conus, these snails are predatory and venomous. They are capable of "stinging" humans, therefore live ones should be handled carefully or not at all.
The size of the shell varies between 64 mm and 105 mm.
This marine species occurs off Southwest Thailand; in the Andaman Sea and off Burma and the Solomon Islands