Abstract:Visceral Leishmaniasis (VL) or kalazar is a fatal neglected tropical disease caused by protozoan parasites of the genus Leishmania, belonging to the family Trypanosomatidae. Leishmania donovani complex are the causative agents of Visceral Leishmaniasis in Ethiopia and its burden is a public health problem where every year health facilities report thousands of cases and hundreds of deaths. Hematological abnormalities are the common presentation for human with Visceral Leishmaniasis, which comprises anemia, leucopenia and thrombocytopenia. Therefore; this study aimed to assess hematological abnormalities among Visceral Leishmaniasis patients attending Gondar University Hospital using a cross sectional study design. Socio-demographic data on 414 Visceral Leishmaniasis patients having complete records on hematological parameters collected from the laboratory log book and hospital chart by using a structured data collection sheet. Data was entered and analyze by using SPSS version 20. From the total 414 Visceral Leishmaniasis patients, 405(97.8%) were males and 9(2.2%) were females. The overall magnitude of anemia, leucopenia, thrombocytopenia, neutropenia and Lymphopenia was 94.4%, 95.4%, 90.1%, 90.1% and 37.9% respectively. There was a significant association between age and prevalence of anemia, neutropenia and thrombocytopenia. The finding of the study shows with predominant existence of anemia, leucopenia and thrombocytopenia. Thus, specific diagnosis and monitoring of hematological abnormalities is required for early treatment of the disease and decreases mortality rate due to these abnormalities.