Papilio weymeri is a species of swallowtail butterfly in the Papilioninae subfamily that is endemic to Papua New Guinea where it is found on Los Negros and Manus Islands.

Both sexes have cream fringe spots but only females have orange-red eyespot and dark coloured scales.

On the reverse the wings are dark brown, the forewings bear a series of white postdiscal macules, the hindwings bear a row of white macules, a few blue lunulae and an orange eyespot in the anal angle.

In the female the wings are dark brown on the obverse, the forewings have a lighter, rather fuzzy band and submarginal yellow macules.

The hindwings bear yellow submarginal lunules, large iridescent blue postdiscal macules and an orange eyespot in the anal angle.