Xylophagaidae is a family of marine bivalves. They are woodboring molluscs similar to shipworms and range from the sublittoral zone to the deep sea.
Xylophagaidae was first recognized as a subfamily Xylophagainae with the family Pholadidae.
The Xylophagaidae family contains seven extant genera:
There is also one genus only known from the fossil record: