This study investigates the impacts of climate change on food security in a small island nation Kiribati. It uses panel data econometric approaches to model the relationships between selected factors of climate change and selected indicators of food security for the period 1961 to 2000. 42 other countries are also covered in this study for comparison purposes. The key objectives of this study are to find the effects of climate factors – temperature and precipitation – on selected food security indicators, their impacts in Kiribati and compared to other countries, and how climate change affects food security in different parts or regions of the worlds. Findings from this study confirm the results of previous studies that climate change is influencing food security. Using the selected indicators of food security, this study shows that factors of climate change have negative impacts on food security. But the most imperative and unique feature of this study is that, even though it only investigates the impacts of climate change on food security, its findings provide new empirical evidences that Kiribati is one of the most affected countries in the world by climate change. In addition, the study also finds that the Pacific region is one of the severely affected regions.