Euophrys subtilis is a species of jumping spider in the genus Euophrys that is endemic to South Africa. The species was first described in 2014 by Wanda Wesołowska, Galina Azarkina and Anthony Russell-Smith. It is a small spider, with a body that consists of a cephalothorax that measures between 1.6 and 1.7 mm (0.06 and 0.07 in) long and a abdomen that is between 1.7 mm and 1.9 mm (0.07 in) long. The carapace, the topside of the cephalothorax, is dark brown and the underside of the cephalothorax, or sternum, is a lighter brown. The pattern on the abdomen differs between the female and the male. The female has a creamy-white surface that is marked with dark spots. The male has a brown band across its brownish-grey surface. They have brown legs. The copulatory organs enable the spider to be distinguished from other species in the genus. The male has a long thin embolus on its palpal bulb, although not as long as Euophrys nana. The female has wide insemination ducts that loop in the middle and spherical spermathecae.

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