The Bornean species of the perlid genusNeoperlaare described. The fauna includes representatives of theclymene‐ andmontivaga‐groups. Several species-complexes within these groups are distinguished. Redescriptions of previously named species are based on a study of type material, except forN. variegata. Lectotypes are designated for several species. A number of species known only from females cannot presently be assigned to named species and are given provisional informal letter designations. Named species recognized in this study are:N. rougemontisp. n.;N.sabahsp. n.;N. theobromaesp. n.;N. parvaBanks, 1939;N. edmundsiStark, 1983;N. starkisp. n.;N. Sarawaksp.n.;N. borneensis(Enderlein,1909) comb, n.;N. naviculataKlapalek, 1909;N. naviculata cruxssp. n.;N. harina Navás, 1929;N. furciferaKlapálek, 1909;N. bilobatasp. n.;N.furcatasp. n.;N. tetrapodasp. n.;N. securiferasp. n.;N. multilobatasp. n.;N. connectenssp. n.;N. divergenssp. n.;N. variegataKlapálek, 1909 (=N. lebanginaNavás, 1929, s y n . n o v.; =N. centralisBanks, 1939, s y n. n o v.);N. silvaeaesp. n.;N. alboguttatasp. n.;N. unicolorsp. n.;N. dayaksp. n.;N. reticutalasp. n.;N. paucispinosasp. n.;N. seriespinosasp. n.;N. spinosasp. nmlçN. bicoronata sp. n.;N. punansp. n.;N. nanginaNavás, 1929 is a new synonym ofEtrocorema nigrogeniculatum(Enderlein, 1909).N. hageniBanks, 1920 andN. pumilioKlapálek, 1921 had previously been transferred to the genusPhanoperla.