Three new species and seven new records of eriophyoid mite species from Saudi Arabia are described and illustrated. They are Mackiella phoenicis Keifer, 1939 rec. nov. on Phoenix dactylifera L. (Arecaceae), Cecidophyopsis rosmarinusis sp. nov. on Rosmarinus officinalis L. (Lamiaceae), Aceria cynodoniensis Sayed, 1946 rec. nov. on Sesuvium portulacastrum (L.) L. (Aizoaceae), Aceria daturae (Soliman & Abou-Awad, 1977) rec. nov. on Datura stramonium L. (Solanaceae), Aceria fica (Cotté, 1920) rec. nov. on Ficus carica L. (Moraceae), Aceria nilotica (Abou-Awad & Nasr, 1983) on Pennisetum alopecuroides (L.) Spreng. (Poaceae), Epitrimerus saudiarabis sp. nov. on Phoenix dactylifera L. (Arecaceae), Abacarus cynodonsis Abou-Awad & Nasr, 1983 on Sesuvium portulacastrum (L.) L. (Aizoaceae), Aculus portulacus sp. nov. on Portulaca oleraceaL. (Portulacaceae) and Aculus zaheri (Abou-Awad, 1979) on Solanum nigrum L. (Solanaceae). All new species are vagrants on the host plants. A checklist of eriophyoid mites from Saudi Arabia is provided.