Protolophidae is a family of harvestmen in the order Opiliones. There is at least one genus, Protolophus, and about six described species in Protolophidae found in Western North America.

ITIS Taxonomic note:

• While Protolophidae has been nested within Sclerosomatidae by some workers, it has been traditionally recognized as a separate family (Giribet et al., 2010); although a recent treatment (Kury in Zhang, 2013) does not recognize the family Protolophidae, others do (Hedin et al., 2012; Kury website 'Classification of Opiliones' (2014)).

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