One of the main challenges facing Indonesian development today is addressing regional inequality. Central Sulawesi Province, with its distinct natural resource endowment, is a significant contributor to this disparity. This study aims to analyze the level of inequality between the western and eastern regions and all districts/cities in Central Sulawesi Province from 2020 to 2024. The data used in this study are secondary data obtained from the Central Sulawesi Central Statistics Agency. The analysis tool used is the Williamson Index. Based on the analysis of regional development inequality in Central Sulawesi Province, it can be concluded that inequality in the western region tends to be more evenly distributed or lower, with an average IW value of 0.31 (IW <0.35), due to its relatively homogeneous economic structure. Inequality in the eastern region is very high, with an average IW of 1.32 (IW < 0.35), primarily due to economic concentration in the Morowali and North Morowali industrial areas, which is not offset by equitable infrastructure and investment distribution. Inequality across all regions in Central Sulawesi is very high, with an average IW of 1.44 (IW > 1), due to differences in natural resources, geographic conditions, and industrial concentration in certain areas.
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