Background & Objectives: The aim of this study was to investigate the trend of mortality of children under five years old in Kurdistan Province during 2007 to 2011.

Methods: The data of this descriptive-analytical study on deaths and births was collected from provincial deaths registry system and Civil Registration System during 2007 to 2011. The main indicators including under-five mortality, infant mortality, and neonatal mortality rate during the given period were studied. The relationship between variables was calculated using chi-square test.

Results: The neonatal mortality rate changed from 13.5 per thousand live births in 2007 to 12.2 per thousand live births in 2011. During the same period of time, the infant mortality rate and under-five mortality rate declined from 17.1 and 20.2 to 14.9 and 17.4 per thousand live births, respectively. A significant relationship was found between gender and infant mortality. Among the major causes of mortality, prenatal diseases, especially infant diseases, were the most common cause of death in the neonatal period.

Conclusion: According to the results of this study, although there was a reduction in the under-five mortality rate during these years, the observed decline, especially the decline in infant mortality rate, was very slow. There are still some preventable causes of death in children which require more attention by the health system and researchers