Papilio rumiko is a species of swallowtail butterfly. It is found from the south-western United States, through Mexico, El Salvador, Honduras, Costa Rica to Panama. The northernmost record is north-eastern Colorado. Pupation takes place in a pupa of 26–36 mm in length. It is mottled pale to greyish and dark brown, resembling the surface of a tree or branch it is attached to. The darkness of a pupa is frequently determined by the color of the surface it rests on.