Engaeus affinis

{{Short description|Species of crayfish}}

{{Speciesbox

| image = Engaeus affinis, Wirrawilla Rainforest Walk imported from iNaturalist photo 79803655.jpg

| status = DD

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Doran, N. |author2=Horwitz, P. |date=2010 |title=Engaeus affinis |volume=2010 |page=e.T153625A4522034 |doi=10.2305/IUCN.UK.2010-3.RLTS.T153625A4522034.en |access-date=19 November 2021}}

| genus = Engaeus

| species = affinis

| authority = Smith & Schuster, 1913

}}

Engaeus affinis is a species of crayfish in the family Parastacidae. It is endemic to Australia.