Porrorhynchus is a genus of beetles in the family Gyrinidae, containing the following species:
The subgenus Rhomborhynchus <small>Ochs, 1926</small>, containing the species Porrorhynchus depressus <small>Régimbart, 1892</small> and Porrorhynchus misoolensis <small>(Ochs, 1955)</small>, was tenatively transferred to Dineutus in 2017.