Dioctophyme is a monotypic genus of nematodes belonging to the family Dioctophymidae.

The only species is Dioctophyme renale.

[1] Much older literature uses the alternative spelling "Dioctophyma" and the family name "Dioctophymatidae" but these alternative spellings were suppressed by the ICZN in a 1987 ruling.

[2] The species is found in Northern America and Japan.

[1]