Abstract: An investigation into eimeriidosis of New Zealand White rabbits was carried out in existence rabbitoris of northwest region, Urmia suburb, Iran. Four hundred and thirty six rabbits in two rabbiteries which were from less than six months to over 12 months old were subjected to examination. Fecal samples were collected and performed to flotation technique using for demonstrating the presence of oocysts and sporulation of oocysts. The values of the Oocysts Per Gram (OPG) of feces vary from 5000 to 60000. Of these, 60% had 5000-29000 OPG. Of infected animals, 53 (55.8%) and 42 (44.2%) were females and males, respectively. Mixed infections were common and 67% of the animals carrying 2-4 different species. Six species of Eimeria were identified. The infection of livers with Eimeria stiedae was 19.9%. There was high rate of infection of intestinal contents (80.1%), especially, with E. magna (34.8%), E. irresidua (20.8%), E. perforans (9.8%), E. media (8.3%) and E. piriformis (6.4%). Histopathology changes were indicative of inflammatory reactions brought about by parasitic infection with Eimeria species and its consequent irritating effects on the liver and intestine.