This study aims to analyze the factors that influence the poverty rate in three provinces on the island of Sumatra, namely Aceh, Bengkulu, and Lampung. Against the backdrop of the huge challenges that the three provinces face in terms of infrastructure, employment opportunities, and the quality of public services, this study focuses on the influence of variables such as unemployment, inflation, income inequality, and the Human Development Index (HDI) on the poverty rate. Using the multiple linear regression analysis method, this study evaluates data from the period 1999 to 2023. The results show that the unemployment rate has a significant positive effect on the poverty rate, while inflation and income inequality have a negative impact. HDI also shows a significant effect in reducing the poverty rate. By finding the interaction between these factors, the research is expected to provide recommendations for more inclusive and sustainable development policies to improve people's welfare in the three provinces.