This study to determine the availability of public infrastructures such as roads, electricity, and ISSN 2162-4860 2017 http://ber.macrothink.org 376 water on the development disparities of districts/cities in South Sumatera. This study using a quantitative approach. Technical analysis of using Williamson index and panel regression model. The results of the study found that public infrastructure such as electricity and water have negative sign and significant effect on development disparities districts/cities in South Sumatera. This means that an increase in the amount of electricity and water infrastructure can reduce development disparities. In contrast, road infrastructure has a positive effect on development disparities. It means that increasing road infrastructure increases development disparity in districts/cities in South Sumatera Province. Business and Economic Research

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