Echinorhynchidae, from Ancient Greek ἐχῖνος (ekhînos), meaning "hedgehog", and ῥύγχος (rhúnkhos), meaning "snout", is a family of acanthocephalan parasitic worms from the order Echinorhynchida. The adult worms live in the intestines of fishes, amphibians and reptiles. The family contains the following genera, organised by subfamily.

• Circinatechinorhynchinae Bhattacharya, 2007
  • Circinatechinorhynchus Bhattacharya, 2007
• Echinorhynchinae Cobbold, 1879
  • Acanthocephalus Koelreuther, 1771
  • Brasacanthus Thatcher, 2001
  • Echinorhynchus Zoega in Müller, 1776
  • Frilloechinorhynchus Bhattacharya, 2007
  • Solearhynchus de Buron & Maillard, 1985
• Incertae sedis
  • Neoacanthocephaloides Cable & Quick, 1954
  • Pseudoacanthocephalus Petrochenko, 1958 - This genus parasitizes amphibians and reptiles globally.
    • Pseudoacanthocephalus goodmani was found infesting Sclerophrys gutturalis, an invasive species on the island of Mauritius.
    • Pseudoacanthocephalus lutzi was found infesting cane toad in the Americas.
    • Pseudoacanthocephalus nickoli was found infesting Sanguirana luzonensis and Hylarana similis on Luzon Island, Philippines.
    • Pseudoacanthocephalus smalesi was found infesting Sphenomorphus abdictus on Luzon Island, Philippines.

In 2019, Kvach & de Buron added to the family a new species, Harpagorhynchus golvaneuzeti, which represents a new genus, Harpagorhynchus and a new subfamily, the Harpagorhynchinae. The specific epithet refers to two famous French parasitologists, Yves-Jean Golvan and Louis Euzet.

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