Lynchius is a genus of frogs in the family Strabomantidae.

[1] The distribution of Lynchius is restricted to the Cordillera Oriental in southern Ecuador and Cordillera de Huancabamba in northern Peru.

[3] The sister taxon of Lynchius is Oreobates.

[2] Lynchius are relatively small frogs (snout–vent length up to 43 mm (1.7 in) in Lynchius flavomaculatus) with a narrow head, not as wide as body.

[1] The following species are recognised in the genus Lynchius:[2]