Abstract During 2011-2012, a faunistic survey on oribatid mites was conducted in Zanjan county. The mites were extracted using Berlese- tullgren setup and mounted after clearing in Nesbitt’s fluid. 46 species from 35 genera belonging to 24 families were identified. All of them were new records for mite fauna of Zanjan province. Amerobelbidae: Amerobelba decedens; Brachychthoniidae: Brachychthonius gracilis; Carabodidae: Austrocarabodes sp.; Cosmochthoniidae: Cosmochthonius foliatus, C. sp. nr. reticulatus; Damaeidae: Belba sp.; Damaeolidae: Fosseremus laciniatus; Epilohmanniidae: Epilohmannia cylindrica cylindrica; Euphthiracaridae: Acrotritia ardua; Gymnodamaeidae: Jacotella frondeus; Galumnidae: Allogalumna sp.; Galumna iranensis, G. karajica, Pergalumna sp.; Haplochthoniidae: Haplochthonius sanctaeluciae, H. simplex; Haplozetidae: Haplozetes fusifer, Peloribates sp.; Hypochthoniidae: Hypochthonius luteus; Licnodamaeidae: Licnodamaeus fissuratus, Licnodamaeus sp. nr. itsukushima; Lohmanniidae: Papillacarus aciculatus; Nothridae: Nothrus biciliatus; Oppiidae: Anomaloppia mazandaranica,  A. ozkani, Corynoppia sp.,  Multioppia wilsoni laniseta, Oppia denticulata, Oppia sp., Oppiella (Oppiella) nova nova,  Rhinoppia bipectinata,  Ramusella (Ramusella) puertomonttensis, R. (Rectoppia) damavandica, R. (Rectoppia) faciata, Oribatulidae: Oribatula (Zygoribatula) connexa, O. (Oribatula) pallida, O. (Zygoribatula) sp. nr. skrjabini; Passalozetidae: Passalozetes africanus; Phthiracaridae: Phthiracarus sp. nr.  incredibilis;  Protoribatidae: Liebstadia similis, Protoribates (Protoribates) paracapucinus, Sicaxylobates sp.; Scheloribatidae: Scheloribates praeincisus, Scheloribates  sp.; Sphaerochthoniidae: Sphaerochthonius splendidus; Tectocepheidae: Tectocepheus velatus