Background and Objectives: Infectious diseases are still a major health problem in the world. Thus, this study was conducted to describe and determine the most prevalent infection sites in patients admitted to the infectious ward of Imam Reza hospital in Kermanshah.

Material and Methods: This cross-sectional descriptive study was conducted by referring to 385 clinical records of patients between 2014 and 2015. Data were collected through a data review check list including demographics and clinical information.

Results: The most common diagnoses of admitted patients were infections of lower respiratory tract 118 (30.60%), sepsis with unknown source 72 (18.7%), and skin and soft tissue infections 59 (15.3%), respectively.
Conclusion: The lower respiratory tract infections and sepsis are relatively more prevalent than other infectious diseases in this study.